Web 57DHYAFZZFLLV October 1 2026 England and Wales 2026 through September PurpleAir PM 2 point 5 monthly averages   The PurpleAir Map uses the standard US EPA Air Quality Index (AQI) gradient color scale to show real-time PM2.5 pollutant levels.
AQI Color Breakdown
Green (0–50): Good. Air quality is safe and satisfactory.
Yellow (51–100): Moderate. Acceptable air, though sensitive individuals may face minor risks.
Orange (101–150): Unhealthy for Sensitive Groups (children, older adults, and those with heart/lung conditions).
Red (151–200): Unhealthy. General public may experience health effects; sensitive groups may experience more serious effects.
Purple (201–300): Very Unhealthy. Health alert; everyone may experience health effects.
Maroon / Brown (300+): Hazardous. Emergency conditions affecting the entire population.
monthly averages PM 2 point 5  in micrograms per cubic meter	@iwweather A	@iwweather B	20 Plantation Road Oxford A	20 Plantation Road Oxford B	2020-zen A	2020-zen B	3.090 Crushing and Grinding A		3.090 Crushing and Grinding B	3.091 NORM A	3.091 NORM B
1/1/2026	44	42	54	53	63	63
2/1/2026	34	34	49	46	65	64
3/1/2026	68	66	62	60	69	69
4/1/2026	39	39	40	38	55	55
5/1/2026	54	53	47	47	55	54
6/1/2026	35	33	24	27	37	37
7/1/2026	48	43	44	46	62	58
8/1/2026	30	26	23	26	46	45
9/1/2026	23	21	16	18	32	32	4		3	2	2
Municipality	Wight	Wight	Oxford	Oxford	Birmingham	Birmingham	Cornwall		Cornwall	Cornwall	Cornwall
Monitor Number	1	2	3	4	5	6	7		8	9	10

monthly averages PM 2 point 5  in micrograms per cubic meter	3.102 Upper mineral processing  A	3.102 Upper mineral processing  B	A6 Hospital A	A6 Hospital B	Aberdeen Avenue A	Aberdeen Avenue B	Aberystwyth A	Aberystwyth B	Acton A	Acton B
1/1/2026			62	63	55	54	21	21	59	55
2/1/2026			56	57	56	55	24	24	80	72
3/1/2026			62	63	61	60	52	51	61	57
4/1/2026			47	49	38	34	35	34	48	41
5/1/2026			43	43	48	43	39	37	54	52
6/1/2026			31	29	32	25	27	24	35	103
7/1/2026			52	53	39	35	47	41	51	43
8/1/2026			42	42	28	21	36	31	32	28
9/1/2026	3	6	30	31	23	16	13	12	26	23
Municipality	Cornwall	Cornwall	Chorley	Chorley	Cambridge	Cambridge	Aberystwyth	Aberystwyth	Acton near London	Acton near London
Monitor Number	11	12	13	14	15	16	17	18	19	20

monthly averages PM 2 point 5  in micrograms per cubic meter	AGWood A	AGWood B	AJ A	AJ B	Allerton C of E A	Allerton C of E B	Allington A20 KENT A	Allington A20 KENT B	Apley Castle A	Apley Castle B
1/1/2026	0	44			68	62	5	79	793	43
2/1/2026	0	33			66	61	2	68	89	54
3/1/2026	0	58			62	59	11	98	72	59
4/1/2026	0	30			47	42	2	64	43	38
5/1/2026	0	46			41	37	5	78	39	46
6/1/2026	0	24			29	27	2	61	23	26
7/1/2026	0	41			48	44	8	67	48	52
8/1/2026	0	23			44	40	8	59	28	32
9/1/2026	0	19	42	40	29	27	7	57	7348	15
Municipality	Weybridge	Weybridge	England	England	Alwoodley	Alwoodley	Maidstone	Maidstone	Apley	Apley
Monitor Number	21	22	23	24	25	26	27	28	29	30

monthly averages PM 2 point 5  in micrograms per cubic meter	Argyle Street A	Argyle Street B	Arnside Outside A	Arnside Outside B	Ashford A	Ashford B	Astley Road A	Astley Road B	B146 CEAI MR 1 A	B146 CEAI MR 1 B
1/1/2026	67	68			61	60			8	11
2/1/2026	67	68			53	49			4	6
3/1/2026	74	74	51	53	70	68			13	16
4/1/2026	52	53	33	198	44	46			4	5
5/1/2026	54	55	29	121	56	57			7	9
6/1/2026	33	34	26	28	37	38			6	8
7/1/2026	836	55	41	44	45	46			17	22
8/1/2026	37	40	34	110	33	35			4	7
9/1/2026	28	29	20	111	31	32	44	47
Municipality	Cambridge	Cambridge	Arnside	Arnside	Kent	Kent	Astley Road	Astley Road	Campus, Milton Keynes	Campus, Milton Keynes
Monitor Number	31	32	33	34	35	36	37	38	39	40

monthly averages PM 2 point 5  in micrograms per cubic meter	B4 Indoor A	B4 Indoor B	B85 Indoor A	B85 Indoor B	B85 Yard A	B85 Yard B	Bar Hill A	Bar Hill B	Bath Road, Cheltenham A	Bath Road, Cheltenham B
1/1/2026	15	16	4	4	44	41	53	55	52	59
2/1/2026	10	10	1	2	31	28	54	55	47	55
3/1/2026	32	33	11	12	62	62	58	59	59	64
4/1/2026	14	14	4	4	31	28	29	34	39	51
5/1/2026	24	27	8	9	51	48	34	43	152	56
6/1/2026	19	20	13	14	26	24	19	26	33	43
7/1/2026	36	36	27	28	44	41	31	36	189	57
8/1/2026	16	15	9	10	27	24	18	23	39	52
9/1/2026	12	12	11	12	21	20	13	16	27	38
Municipality	England	England	England	England	Southampton	Southhampton	Cambridge	Cambridge	Cheltenham	Cheltenham
Monitor Number	41	42	43	44	45	46	47	48	49	50

monthly averages PM 2 point 5  in micrograms per cubic meter	Belvedere out A	Belvedere out B	Berw Road A	Berw Road B	Blackburn Rd Wheelton A	Blackburn Rd Wheelton B	Bolton-le-Sands A	Bolton-le-Sands B	Botley Road A	Botley Road B
1/1/2026	34	41	45	42	57	57			8128	55
2/1/2026	29	36	32	29	49	48			7612	51
3/1/2026	53	57	59	58	62	61			7635	64
4/1/2026	27	32	35	33	45	43			7349	42
5/1/2026	37	44	46	43	41	38			7006	47
6/1/2026	23	24	32	31	29	26			6605	26
7/1/2026	41	36	54	53	52	51			6511	49
8/1/2026	21	1354	54	54	40	37	0	26	6583	26
9/1/2026	13	15			24	24	0	23	6653	18
Municipality	Oxford	Oxford	Glyncoch	Glyncoch	Wheelton	Wheelton	Lancashire	Lancashire	Oxford	Oxford
Monitor Number	51	52	53	54	55	56	57	58	59	60

monthly averages PM 2 point 5  in micrograms per cubic meter	Bracken Close A	Bracken Close B	Brinscall Ashmeadow Lane A	Brinscall Ashmeadow Lane B	Broadley Terrace A	Broadley Terrace B	Calenick village A	Calenick village B	Castle Crescent A	Castle Crescent B
1/1/2026	64	63	58	56	64	63	21	29	67	64
2/1/2026	55	55	57	55	59	58	18	38	56	55
3/1/2026	59	60	60	58	72	70	3240	65	59	58
4/1/2026	42	46	45	38	52	49	0	33	36	34
5/1/2026	36	41	43	37	64	62	0	49	29	28
6/1/2026	26	28	32	27	39	37	0	30	23	22
7/1/2026	48	52	52	46	52	50	0	47	40	38
8/1/2026	39	43	43	37	34	33	0	22	37	33
9/1/2026	26	29	28	23	31	29	0	17	23	19
Municipality	Chorley	Chorley	Brinscall	Brinscall	Broadley Terrace near London	Broadley Terrace near London	Calenick	Calenick	Kendal	Kendal
Monitor Number	61	62	63	64	65	66	67	68	69	70

monthly averages PM 2 point 5  in micrograms per cubic meter	Castle Grange A	Castle Grange B	CHALFONT RD  2 A	CHALFONT RD  2 B	Channels A	Channels B	Charlbury_Rd_1 A	Charlbury_Rd_1 B	Charlesby Drive A	Charlesby Drive B
1/1/2026	75	75	53	47	52	49	50	50	51	48
2/1/2026	64	64	48	39	50	44	44	43	46	42
3/1/2026	63	63	61	57	62	60	59	59	64	62
4/1/2026	48	46	40	30	31	28	37	36	42	37
5/1/2026	39	36	47	38	47	116	66	66
6/1/2026	31	28	27	19	23	214	28	27
7/1/2026	52	51	47	36	28	21	43	44
8/1/2026	47	43	27	17	19	14	23	22	37	30
9/1/2026	26	112	19	12	14	11	16	14	23	19
Municipality	Bramhope	Bramhope	Oxford	Oxford	St Albans to Chelmsford	St Albans to Chelmsford	Oxford	Oxford	Highworth	Highworth
Monitor Number	71	72	73	74	75	76	77	78	79	80

monthly averages PM 2 point 5  in micrograms per cubic meter	Charlton Close cheltenham A	Charlton Close cheltenham B	Charltonkings infant school A	Charltonkings infant school B	Cheddar – Hillfield A	Cheddar – Hillfield B	Chesterton A	Chesterton B	Chorley Central Devonshire A	Chorley Central Devonshire B
1/1/2026	45	46	32	29	56	54	55	60	65	61
2/1/2026	36	37	57	56	41	40	58	58	58	55
3/1/2026	58	57	69	69	61	61	55	59	64	61
4/1/2026	29	28	49	46	38	39	47	43	51	44
5/1/2026	44	42	54	54	53	51	52	46	44	38
6/1/2026	26	24	35	33	34	32	35	29	30	24
7/1/2026	48	44	55	55	52	51	268	29	52	46
8/1/2026	33	31	41	40	28	27	51	46	42	37
9/1/2026	14	13	51	50	23	23			30	26
Municipality	Cheltenham	Cheltenham	London	London	Cheddar	Cheddar	Chesterton	Chesterton	Chorley	Chorley
Monitor Number	81	82	83	84	85	86	87	88	89	90

monthly averages PM 2 point 5  in micrograms per cubic meter	Chorley Central South A	Chorley Central South B	Chorley South West (The Oaks) A	Chorley South West (The Oaks) B	Church Fenton Out A	Church Fenton Out B	Churchdown Indoor A	Churchwood, Fittleworth, West Sussex, RH20 1HP, UK A	Churchwood, Fittleworth, West Sussex, RH20 1HP, UK B	Cirencester Rd A
1/1/2026	62	59	56	62			6	51	42	54
2/1/2026	56	54	50	56			2	44	36	49
3/1/2026	61	59	57	61			2	66	63	62
4/1/2026	47	43	36	46			1	38	31	38
5/1/2026	43	41	36	45			1	56	54	52
6/1/2026	31	28	23	30			1	36	32	31
7/1/2026	51	47	40	51			1	51	46	52
8/1/2026	42	39	33	42	0	0	1	31	28	36
9/1/2026	30	26	22	28	13	14	0	458	21	21
Municipality	Chorley	Chorley	Chorley	Chorley	North Yorkshire	North Yorkshire	England	Fittleworth	Fittleworth	England
Monitor Number	91	92	93	94	95	96	97	98	99	100

monthly averages PM 2 point 5  in micrograms per cubic meter	Cirencester Rd B	Clayton-le-Woods A	Clayton-le-Woods B	Clun A	Clun B	Complins Close A	Complins Close B	Conway close A	Conway close B	Crabtree Rd A
1/1/2026	53	61	58	65	66	54	52	29	36	51
2/1/2026	46	56	54	88	88	47	42	18	167	47
3/1/2026	61	62	59			62	59	53	222	58
4/1/2026	35	49	40			42	37	35	171	36
5/1/2026	48	44	36			49	43	44	152	47
6/1/2026	28	38	31	52	53	27	24	29	166	24
7/1/2026	49	53	46			48	43	55	23	47
8/1/2026	32	44	36	27	28	26	23	56	162	23
9/1/2026	18	29	22	17	17	18	15			14
Municipality	England	Clayton-le-Woods	Clayton-le-Woods	Clun	Clun	England	England	Conway	Conway	Oxford
Monitor Number	101	102	103	104	105	106	107	108	109	110

monthly averages PM 2 point 5  in micrograms per cubic meter	Crabtree Rd B	Crondall Weather A	Crondall Weather B	CSM 1 A	CSM 1 B	CSM 2 A	CSM 2 B	CSM 3 A	CSM 3 B	CU Ref 2 A
1/1/2026	43									58
2/1/2026	38									55
3/1/2026	57									63
4/1/2026	31	35	34							40
5/1/2026	38	50	48							50
6/1/2026	20	29	29	18	19	18	17	18	17	28
7/1/2026	42	46	46	13	14	13	13	13	13	46
8/1/2026	18	26	26	5	6	5	5	6	5	26
9/1/2026	12	22	21	3	3	3	3	3	2	21
Municipality	Oxford	Crondall	Crondall	CSM Test Mine Camborne Cornwall	CSM Test Mine Camborne Cornwall	CSM Test Mine Camborne Cornwall	CSM Test Mine Camborne Cornwall	CSM Test Mine Camborne Cornwall	CSM Test Mine Camborne Cornwall	CSM Test Mine Camborne Cornwall
Monitor Number	111	112	113	114	115	116	117	118	119	120

monthly averages PM 2 point 5  in micrograms per cubic meter	CU Ref 2 B	DARTeC PEL A	DARTeC PEL B	David Nicholls Close, Littlemore A	David Nicholls Close, Littlemore B	delerius-weather.com A	delerius-weather.com B	Didcot A	Didcot B	Dukes Point A
1/1/2026	0	54	53	54	54	31	25	55	54	42
2/1/2026	0	52	51	48	51	25	21	53	52	37
3/1/2026	0	63	61	65	66	42	37	69	68	57
4/1/2026	0	35	32	43	46	41	37	45	44	30
5/1/2026	28	47	43	52	53	52	51	53	54	44
6/1/2026	58	24	22	31	31	27	26	29	30	28
7/1/2026	77	40	36	50	51	44	46	52	52	34
8/1/2026	34	22	19	29	31	39	43	28	29	18
9/1/2026	27	15	13	19	20			20	20	11
Municipality	CSM Test Mine Camborne Cornwall	Milton Keynes	Milton Keynes	Oxford	Oxford	Leeds	Leeds	Didcot	Didcot	Hampstead near London
Monitor Number	121	122	123	124	125	126	127	128	129	130

monthly averages PM 2 point 5  in micrograms per cubic meter	Dukes Point B	Duxbury Hall A	Duxbury Hall B	Dyserth A	Dyserth B	Earl Street, Oxford A	Earl Street, Oxford B	East Avenue A	East Avenue B	Eaton Place A
1/1/2026	42	62	58	57	56	57	6633			50
2/1/2026	37	57	53	6098	35	52	6530	45	39	28
3/1/2026	57	62	58	5623	60	66	6531	63	60	42
4/1/2026	30	46	38	41	37	40	6499	44	41	24
5/1/2026	44	44	37	43	43	47	6461	52	51	39
6/1/2026	27	30	25	21	22	26	6421	31	32	29
7/1/2026	32	51	44	181	53	52	6391	51	51	40
8/1/2026	19	43	37	798	37	26	6419	29	31	23
9/1/2026	13	28	23	160	17	18	6489	19	22	21
Municipality	Hampstead near London	Chorley	Chorley	Dyserth	Dyserth	Oxford	Oxford	England	England	Eaton Place near London
Monitor Number	131	132	133	134	135	136	137	138	139	140

monthly averages PM 2 point 5  in micrograms per cubic meter	ESI roof A	ESI roof B	Falmouth Docks A	Falmouth Docks B	Falmouth Harbour North Quay A	Falmouth Harbour North Quay B	Farsley PurpleAir PA-II Air Quality Sensor A	Farsley PurpleAir PA-II Air Quality Sensor B	Fen Edge A	Fen Edge B
1/1/2026	19	15					71	70	52	42
2/1/2026	3	1					65	63	55	29
3/1/2026							66	62	55	4
4/1/2026							53	47	30	1
5/1/2026							46	38	37	3
6/1/2026	58	56					33	26	19	1
7/1/2026	51	44	54	52	52	53	52	43	2265	2
8/1/2026	26	22	26	23	24	24	47	39	27	4
9/1/2026			21	19	23	22	34	27	14	1
Municipality	Buckinghamshire	Buckinghamshire	Falmouth	Falmouth	Falmouth	Falmouth	Leeds	Leeds	Peterborough	Peterborough
Monitor Number	141	142	143	144	145	146	147	148	149	150

monthly averages PM 2 point 5  in micrograms per cubic meter	Flora Gardens A	Flora Gardens B	Freshfield Lane A	Freshfield Lane B	Fulham Riverside A	Fulham Riverside B	G1SAA A	G1SAA B	Garden Mead, West Hoathly A	Garden Mead, West Hoathly B
1/1/2026	59	57	0	57	53	52	57	56	8	9
2/1/2026	54	53	0	52	50	47	56	56	13	25
3/1/2026	66	64	0	67	56	55	60	59	23	39
4/1/2026	49	45	0	110	36	34	34	33	12	24
5/1/2026	56	54	0	58	50	48	42	41	24	39
6/1/2026	39	34	0	42	28	27	23	23	14	27
7/1/2026	51	46	0	53	46	43	43	39	26	39
8/1/2026	36	32	0	36	27	26	57	24	13	23
9/1/2026	51	26			18	18	16	16
Municipality	Flora Gardens near London	Flora Gardens near London	Haywards Heath	Haywards Heath	Fulham Riverside near London	Fulham Riverside near London	Cambridge	Cambridge	West Hoathly	West Hoathly
Monitor Number	151	152	153	154	155	156	157	158	159	160

monthly averages PM 2 point 5  in micrograms per cubic meter	Glovers Way, Burscough. West Lancashire A	Glovers Way, Burscough. West Lancashire B	Graigwen A	Graigwen B	Great Cambourne A	Great Cambourne B	Great Gransden A	Great Gransden B	Hairpin Cottage Surlingham A	Hairpin Cottage Surlingham B
1/1/2026	44	48	38	49	57	58			66	69
2/1/2026	42	47	25	32	57	59	22	33	66	68
3/1/2026	52	53	58	61	62	64	55	62	66	65
4/1/2026	22	26	29	37	37	43	27	37	51	38
5/1/2026	17	19	43	51	49	52	38	47	54	52
6/1/2026	9	9	28	33	25	31	69	24	34	31
7/1/2026	23	27	48	53	42	46	205	38	44	42
8/1/2026	17	19	52	54	25	29	23	22	34	30
9/1/2026			18	22	17	21	18	14	207	24
Municipality	Burscough	Burscough	Graigwen	Graigwen	Cambridge	Cambridge	Cambridge	Cambridge	Norwich	Norwich
Monitor Number	161	162	163	164	165	166	167	168	169	170

monthly averages PM 2 point 5  in micrograms per cubic meter	Hamilton Road A	Hamilton Road B	Hanover, Brighton A	Hanover, Brighton B	Hanslope Bunker A	Hanslope Bunker B	Hardwick A	Hardwick B	Heath Charnock Chorley A	Heath Charnock Chorley B
1/1/2026			54	28	90	78	60	57	55	56
2/1/2026	31	34	46	23	55	44	60	57	51	53
3/1/2026	59	61	66	55	72	61	64	61	56	58
4/1/2026	35	42	40	21	63	53	43	38	35	42
5/1/2026	41	49	54	36	67	56	52	49	34	42
6/1/2026	20	26	37	18	59	46	29	27	24	29
7/1/2026	38	48	46	24	66	52	43	38	41	47
8/1/2026	18	24	34	16	50	29	27	24	32	38
9/1/2026							21	18
Municipality	Oxford	Oxford	Brighton	Brighton	Milton Keynes	Milton Keynes	Cambridge	Cambridge	Chorley	Chorley
Monitor Number	171	172	173	174	175	176	177	178	179	180

monthly averages PM 2 point 5  in micrograms per cubic meter	High Legh Primary A	High Legh Primary B	Horsham A	Horsham B	iRobinathome007 A	iRobinathome007 B	Kingscoffe house A	Kingscoffe house B	Kingston Canal A	Kingston Canal B
1/1/2026	58	52	54	52	44	45			49	52
2/1/2026	54	43	43	38	32	33			41	43
3/1/2026	60	53	63	61	61	62	66	66	58	58
4/1/2026	45	32	36	33	36	37	28	26	32	32
5/1/2026	41	27	54	53	54	166			39	41
6/1/2026	23	14	33	33	29	32	16	14	22	22
7/1/2026	58	49	48	46	49	51	54	98	37	36
8/1/2026	38	22	28	28	28	29	155	38	19	18
9/1/2026					22	23	27	25	12	11
Municipality	High Legh	High Legh	Horsham	Horsham	Westbury	Westbury	England	England	Oxford	Oxford
Monitor Number	181	182	183	184	185	186	187	188	189	190

monthly averages PM 2 point 5  in micrograms per cubic meter	Lancaster A	Lancaster B	Leatherhead A	Leatherhead B	Leckhampton Road A	Leckhampton Road A	Leckhampton Road B	Leckhampton Road B	LionFreta-BXH A	LionFreta-BXH B
1/1/2026	55	50	59	58		43		44	56	60
2/1/2026	53	46	52	50		37		39	52	56
3/1/2026	57	53	71	70		56		56	64	70
4/1/2026	37	29	42	43	46	29	43	29	41	50
5/1/2026	36	27	56	56	51	42	48	40	55	57
6/1/2026	27	22	37	37	28	24	27	23	33	36
7/1/2026	30	24	54	53	51	43	51	42	43	49
8/1/2026	37	32	34	33	36	30	34	31	34	38
9/1/2026	21	19	28	28	18	14	18	16	21	28
Municipality	Lancaster	Lancaster	Hawk’s Hill	Hawk’s Hill	Cheltenham	Cheltenham	Cheltenham	Cheltenham	Bexley Borough of London	Bexley Borough of London
Monitor Number	191	192	193	194	195	196	197	198	199	200

monthly averages PM 2 point 5  in micrograms per cubic meter	Llanfyrnach A	Llanfyrnach B	Longmeadow Station A	Longmeadow Station B	Lower Woodingdean Outside A	Lower Woodingdean Outside B	LSE CKK Rooftop A	LSE CKK Rooftop B	Lymm A56 (Lymm Round Table) A	Lymm A56 (Lymm Round Table) B
1/1/2026	31	33	56	56	47	47	56	52	57	56
2/1/2026	22	24	52	53	36	36	869	47	56	56
3/1/2026	57	57	62	63	61	62	159	59	65	65
4/1/2026	36	36	29	30	29	31	55	29	51	51
5/1/2026	48	48	34	35	51	52	52	43	48	48
6/1/2026	28	29	24	24	31	30			47	46
7/1/2026	48	48	39	41	38	39	10	6	62	62
8/1/2026	28	29	22	23	24	26	26	18	42	43
9/1/2026	18	19	20	21			49	38
Municipality	Llanfyrnac	Llanfyrnac	Stevenage	Stevenage	Brighton	Brighton	London	London	Lymm	Lymm
Monitor Number	201	202	203	204	205	206	207	208	209	210

monthly averages PM 2 point 5  in micrograms per cubic meter	M	Maidenhead A	Maidenhead B	Marshside-UK A	Marshside-UK B	Martock A	Martock B	MK44 2LA A	MK44 2LA B	Nant Y Patrick A
1/1/2026	56	51	48	58	59	52	51	61	61	51
2/1/2026	52	39	36	53	54	36	36	59	60	52
3/1/2026	64	57	56	60	61	71	69	64	64	56
4/1/2026	41	28	28	44	44	47	47	44	48	34
5/1/2026	55	36	37	37	37	52	52	52	53	31
6/1/2026	33	22	23	25	24	29	29	27	32	19
7/1/2026	43	42	43	49	48	53	53	46	49	52
8/1/2026	34	20	22	41	40	26	28	26	31	34
9/1/2026		13	15			23	24	19	23	14
Municipality	near London	Maidenhead	Maidenhead	Southport	Southport	Martock	Martock	Milton Keynes	Milton Keynes	Trefnant
Monitor Number	211	212	213	214	215	216	217	218	219	220

monthly averages PM 2 point 5  in micrograms per cubic meter	Nant Y Patrick B	Nantwich Weather A	Nantwich Weather B	New Victoria Wing RVI Reception A	NN13 6PN A	NN13 6PN B	North West London A	North West London B	north west London No 2 A	north west London No 2 B
1/1/2026	49	44	57	17	56	59	55	54	38	31
2/1/2026	51	39	54	16	55	58	53	52	41	35
3/1/2026	54	53	60	28	63	66	64	63	68	60
4/1/2026	31	27	40	12	42	47	42	41	44	33
5/1/2026	27	31	43	11	47	52	54	54	54	46
6/1/2026	17	16	23	12	28	31	34	34	32	24
7/1/2026	48	42	53	31	46	50	51	49	52	41
8/1/2026	32	26	37	21	28	31	34	34	39	29
9/1/2026	14	16	24	10	19	21			27	21
Municipality	Trefnant	Nantwich	Nantwich	Newcastle Upon Tyne	Brackley	Brackley	London	London	London	London
Monitor Number	221	222	223	224	225	226	227	228	229	230

monthly averages PM 2 point 5  in micrograms per cubic meter	NSECH Supplies and Delivery Yard A	Nymphsfield Village A	Nymphsfield Village B	Old Road, Oxford,UK A	Old Road, Oxford,UK B	Overcoombe A	Overcoombe B	Paul’s A	Paul’s B	Plumbland A
1/1/2026		53	46	53	48	34	36	51	50	55
2/1/2026		52	43	49	43	28	24	40	38	54
3/1/2026	3	61	58	62	58	61	60	53	52	60
4/1/2026	9	47	37	41	36	34	33	33	32	46
5/1/2026		53	46	51	44	53	53	29	28	34
6/1/2026	11	36	28	30	24	36	36	19	18	27
7/1/2026	29	53	46	48	41	51	52	43	40	52
8/1/2026	16	38	29	26	23	29	29	30	28	37
9/1/2026	7	24	18	19	617	27	19			26
Municipality	Newcastle Upon Tyne	Nymphsfield	Nymphsfield	Oxford	Oxford	Weymouth	Weymouth	Manchester	Manchester	Plumbland
Monitor Number	231	232	233	234	235	236	237	238	239	240

monthly averages PM 2 point 5  in micrograms per cubic meter	Plumbland B	Porth Newquay A	Porth Newquay B	Renal Care Reception A	Ringwood A	Ringwood B	Rochdale Lib Dems A	Rochdale Lib Dems B	Rogart Terrace A	Rogart Terrace B
1/1/2026	53	23	17	16	48	51	62	64
2/1/2026	52	23	16	11	32	34	55	56
3/1/2026	59	201	53	7	61	62	61	62	62	61
4/1/2026	45	63	26	4	27	29	51	53	34	34
5/1/2026	31	73	40	2	44	45	49	52	55	55
6/1/2026	23	53	24	2	29	28	36	37	38	37
7/1/2026	47	54	36	10	47	46	53	53	54	54
8/1/2026	33	47	17	4	26	26	50	51	55	55
9/1/2026	25	61	12	4	22	21
Municipality	Plumbland	Newquay	Newquay	Newcastle Upon Tyne	Ringwood	Ringwood	Rochdale	Rochdale	Glyncoch	Glyncoch
Monitor Number	241	242	243	244	245	246	247	248	249	250

monthly averages PM 2 point 5  in micrograms per cubic meter	Ruabon  A	Ruabon  B	Shirley Warren, Southampton, UK A	Shirley Warren, Southampton, UK B	Sixways, Charlton Kings A	Sixways, Charlton Kings B	SL005 Kirkstall Valley Primary A	SL005 Kirkstall Valley Primary B	SL006 – Primrose Hill Primary A	SL006 – Primrose Hill Primary B
1/1/2026	58	58	6	52			63	63	63	58
2/1/2026	56	56	3	37			77	79	57	53
3/1/2026	56	56	16	65	59	58			58	55
4/1/2026	33	32	3	36	40	36			34	27
5/1/2026	36	34	7	53	52	49			26	20
6/1/2026	22	22	2	29	33	29			17	13
7/1/2026	44	46	4	43	52	49			34	28
8/1/2026	31	33	2	22	39	33			28	25
9/1/2026	12	16	1	19	23	20	19	9	17	14
Municipality	Plas Madoc	Plas Madoc	Southhampton	Southhampton	Cheltenham	Cheltenham	Leeds	Leeds	Leeds	Leeds
Monitor Number	251	252	253	254	255	256	257	258	259	260

monthly averages PM 2 point 5  in micrograms per cubic meter	SL007 Ninelands Primary A	SL007 Ninelands Primary B	SL011 – West End Grove, Horsforth A	SL011 – West End Grove, Horsforth B	SL016 Scholes Main Street A	SL016 Scholes Main Street B	SL020- Rothwell Community Hub A	SL020- Rothwell Community Hub B	SL024 Wetherby Town Centre A	SL024 Wetherby Town Centre B
1/1/2026	62	59	55	63	57	57	54	58	60	61
2/1/2026	56	54	42	56	50	49	48	54	57	57
3/1/2026	54	53	52	59	52	52	52	55	54	54
4/1/2026	32	27	19	35	19	22	26	31	28	26
5/1/2026	26	22	13	26	18	21	24	29	23	21
6/1/2026	13	11	9	17	11	13	4404	14	14	12
7/1/2026	31	27	19	38	26	29	6432	32	31	27
8/1/2026	28	25	17	32	23	28	6458	28	29	26
9/1/2026	14	13	9	17	8	11	6393	2354	16	14
Municipality	Leeds	Leeds	Horsforth	Horsforth	Scholes	Scholes	Leeds	Leeds	Wetherby	Wetherby
Monitor Number	261	262	263	264	265	266	267	268	269	270

monthly averages PM 2 point 5  in micrograms per cubic meter	SL025 – Oakwood A	SL025 – Oakwood B	SL026 Richmond Avenue A	SL026 Richmond Avenue B	SL034  – Bramley Library, Hough Lane A	SL034  – Bramley Library, Hough Lane B	SL037 Lotherton Hall A	SL037 Lotherton Hall B	SL040 Beckett Park A	SL040 Beckett Park B
1/1/2026	58	63	62	57	65	68	6315	62	70	64
2/1/2026	52	58	56	51	82	86	6397	37	57	53
3/1/2026	54	58	58	54	4	3	6466	54	57	55
4/1/2026	31	36	34	23			6475	28
5/1/2026	25	28	28	19			6457	24
6/1/2026	14	16	16	11	18	22	6448	13
7/1/2026	33	36	35	24	35	43	6431	29
8/1/2026	29	31	30	22	34	42	6449	27
9/1/2026	16	18			17	22	4139	14
Municipality	Wetherby	Wetherby	Leeds	Leeds	Leeds	Leeds	Leeds	Leeds	Leeds	Leeds
Monitor Number	271	272	273	274	275	276	277	278	279	280

monthly averages PM 2 point 5  in micrograms per cubic meter	SL042 Manston Grove A	SL042 Manston Grove B	SL046 Saddlers Way, Long Marston A	SL046 Saddlers Way, Long Marston B	SL050 – Bardsey A	SL050 – Bardsey B	SL051 – Bramham A	SL051 – Bramham B	SL056 – Infirmary Street/East Parade A	SL056 – Infirmary Street/East Parade B
1/1/2026	66	66	61	62	58	60	44	48	60	55
2/1/2026	59	58	58	58	53	54	33	35
3/1/2026	59	57	54	54	157	56	41	44
4/1/2026	41	34	25	24	31	32	12	13
5/1/2026	34	27	642	22	25	26	12	12	9	6
6/1/2026	19	14	733	12	17	17	16	17	26	22
7/1/2026	39	263	28	29	53	36	30	32	49	45
8/1/2026	38	32	155	24	32	31	28	31	36	33
9/1/2026	23	19			17	16	13	16	16	13
Municipality	Leeds	Leeds	Long Marston	Long Marston	East Rigton	East Rigton	Bramham	Bramham	Leeds	Leeds
Monitor Number	281	282	283	284	285	286	287	288	289	290

monthly averages PM 2 point 5  in micrograms per cubic meter	SL062 Stainburn View A	SL062 Stainburn View B	SL080 – Sunnyview Terrace A	SL080 – Sunnyview Terrace B	SL94 – TEST A	SL94 – TEST B	Smarden (outdoors) A	Smarden (outdoors) B	SOEE1461_PA3 A	SOEE1461_PA3 B
1/1/2026	38	52	57	56	76	74	49	58
2/1/2026	29	44	54	51	72	67
3/1/2026	52	53	69	66	75	67	47	2
4/1/2026	20	27	58	53	1278	51	53	9
5/1/2026	17	23	55	51	9945	46	137	2
6/1/2026	11	16	43	32	33	31	51	1
7/1/2026	24	34	56	52	52	50	59	1
8/1/2026	23	30	55	49	52	51	51	1
9/1/2026	10	17	42	34
Municipality	Stainburn	Stainburn	Leeds	Leeds	Leeds	Leeds	Smarden	Smarden	Leeds	Leeds
Monitor Number	291	292	293	294	295	296	297	298	299	300

monthly averages PM 2 point 5  in micrograms per cubic meter	Spar A	Spar B	Speen A	Speen B	St Albans St Julians A	St Albans St Julians B	St Michaels Avenue A	St Michaels Avenue B	St Paul’s Road A	St Paul’s Road B
1/1/2026	37	37	56	57	51	44	69	66	33	50
2/1/2026	23	22	52	54	50	41	60	57	24	37
3/1/2026	60	59	61	62	60	58	59	56	49	57
4/1/2026	35	33	36	40	28	26	44	38	23	34
5/1/2026	46	46	52	53	43	41	39	33	29	42
6/1/2026	29	29	26	115	18	4881	26	21	18	26
7/1/2026	53	53	44	42	34	34	46	39	29	46
8/1/2026	55	55	24	25	14	15	37	31	21	32
9/1/2026	22	22	15	17	9	12	27	22	11	19
Municipality	Glyncoch	Glyncoch	Speen	Speen	Saint Albans	Saint Albans	Newcastle Upon Tyne	Newcastle Upon Tyne	England	England
Monitor Number	301	302	303	304	305	306	307	308	309	310

monthly averages PM 2 point 5  in micrograms per cubic meter	St. Ebbes no 3 A	St. Ebbes no 3 B	St. Paul’s Primary School A	St. Paul’s Primary School B	Staunton Road A	Staunton Road B	Stink catcher A	Stink catcher B	Stone Meadow A	Stone Meadow B
1/1/2026	58	49	66	65			73	71	36	32
2/1/2026	55	40	60	59	40	41	65	63	28	37
3/1/2026	66	57	62	60	59	61	67	65	56	32
4/1/2026	53	32	48	42	38	42	51	48	26	25
5/1/2026	54	39	42	37	44	51	43	42	31	33
6/1/2026	37	20	30	26	24	31	32	31	13	15
7/1/2026	52	33	49	44	43	49	53	52	30	33
8/1/2026	32	17	46	40	22	28	48	45	11	13
9/1/2026	23	13	30	26	136	22	32	30	6	7
Municipality	Oxford	Oxford	England	England	Oxford	Oxford	Leeds	Leeds	Oxford	Oxford
Monitor Number	311	312	313	314	315	316	317	318	319	320

monthly averages PM 2 point 5  in micrograms per cubic meter	The Ridings Whittle-le-Woods A	The Ridings Whittle-le-Woods B	Thorpe Hamlet A	Thorpe Hamlet B	Tintern A	Tintern B	Totnes A	Totnes B	Trumps Green A	Trumps Green B
1/1/2026	62	60	61	67	43	3240	52	50	41	35
2/1/2026	57	56	60	65	46	189	31	26	34	28
3/1/2026	63	63	62	66	59	184	66	63	58	55
4/1/2026	52	51	32	38	29	176	38	34	24	22
5/1/2026	45	40	43	51	43	160	51	53	41	37
6/1/2026	32	29	27	32	28	77	30	31	18	15
7/1/2026	53	53	32	39	51	58	42	46	36	31
8/1/2026	44	41	25	30	35	142	20	22	14	12
9/1/2026	30	29	23	28	17	134	17	19	9	7
Municipality	Whittle-le-Woods	Whittle-le-Woods	Norwich	Norwich	Chepstow	Chepstow	Totnes	Totnes	Trumps Green	Trumps Green
Monitor Number	321	322	323	324	325	326	327	328	329	330

monthly averages PM 2 point 5  in micrograms per cubic meter	Upton Park, Newham, London A	Upton Park, Newham, London B	Upton Scudamore A	Upton Scudamore B	WCAN-1 A	WCAN-1 B	WCAN-10 A	WCAN-10 B	WCAN-100-R A	WCAN-100-R B
1/1/2026			47	52	54	53	54	52	53	52
2/1/2026			36	40	41	37	46	39	52	52
3/1/2026			66	69	64	62	67	63	69	69
4/1/2026			33	37	35	33	41	36	36	34
5/1/2026			51	52	46	54	52	47	52	50
6/1/2026			657	29	23	22	32	27	38	33
7/1/2026			257	52	47	46	53	51	53	51
8/1/2026	46	44	63	28	29	26	34	30	39	34
9/1/2026	38	36	21	24	21	17	26	23	29	26
Municipality	Newham near London	Newham near London	Upton Scudamore	Upton Scudamore	Wiltshire	Wiltshire	England	England	Chippenham	Chippenham
Monitor Number	331	332	333	334	335	336	337	338	339	340

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-101 A	WCAN-101 B	WCAN-102 A	WCAN-102 B	WCAN-103 A	WCAN-103 B	WCAN-104 A	WCAN-104 B	WCAN-105 A	WCAN-105 B
1/1/2026	60	58	58	56	54	53	55	55	54	53
2/1/2026	53	49	52	48	52	51	44	43	50	46
3/1/2026	73	70	71	69	69	68	69	70	66	64
4/1/2026	52	46	42	39	45	43	41	41	47	43
5/1/2026	58	55	54	53	54	53	53	53	54	52
6/1/2026	23	20	62	273	34	32	29	29	36	31
7/1/2026	59	55	52	52	54	54	52	52	57	55
8/1/2026	43	36	29	29	34	33	28	28	49	44
9/1/2026	33	28	29	28	26	24	185	24
Municipality	England	England	Salisbury	Salisbury	Swindon	Swindon	Salisbury	Salisbury	Chippenham	Chippenham
Monitor Number	341	342	343	344	345	346	347	348	349	350

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-106 A	WCAN-106 B	WCAN-108 A	WCAN-108 B	WCAN-110 A	WCAN-110 B	WCAN-111 A	WCAN-111 B	WCAN-112 A	WCAN-112 B
1/1/2026	54	54	53	52	60	57	59	58	52	51
2/1/2026	48	47	49	48	55	53	52	51	42	39
3/1/2026	68	67	67	67	72	69	68	66	69	69
4/1/2026	46	45	44	43	47	42	43	40	41	38
5/1/2026	54	53	54	53	56	53	52	49	53	51
6/1/2026	34	32	35	33	37	32	40	36	30	28
7/1/2026	53	53	53	52	55	53	52	47	53	52
8/1/2026	32	33	36	33	37	33	31	26	30	29
9/1/2026	27	23			31	27			25	24
Municipality	Chippenham	Chippenham	Wadswick Green	Wadswick Green	Chippenham	Chippenham	England	England	England	England
Monitor Number	351	352	353	354	355	356	357	358	359	360

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-113 A	WCAN-113 B	WCAN-114 A	WCAN-114 B	WCAN-116 A	WCAN-116 B	WCAN-117 A	WCAN-117 B	WCAN-118 A	WCAN-118 B
1/1/2026	55	55
2/1/2026	44	45
3/1/2026	69	71	69	70
4/1/2026	44	44	44	44	22	24	34	32	34	31
5/1/2026	54	87	53	52	53	54	56	54	370	47
6/1/2026	32	33	33	38	32	33	41	36	31	27
7/1/2026	53	53	52	52	48	51	57	53	53	52
8/1/2026	31	29	32	31	34	36	44	36	127	30
9/1/2026	27	27	28	27	25	27	36	28	26	22
Municipality	Salisbury	Salisbury	Wiltshire	Wiltshire	Trowbridge	Trowbridge	Trowbridge	Trowbridge	Wiltshire	Wiltshire
Monitor Number	361	362	363	364	365	366	367	368	369	370

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-119 A	WCAN-119 B	WCAN-12 A	WCAN-12 B	WCAN-13-R A	WCAN-13-R B	WCAN-15 A	WCAN-15 B	WCAN-17 A	WCAN-17 B
1/1/2026			63	62			58	55	60	62
2/1/2026			53	52			52	43	54	56
3/1/2026			70	69			69	65	70	73
4/1/2026			42	46			51	42	43	48
5/1/2026			54	53			55	52	52	53
6/1/2026	11	9	22	19			38	31	32	32
7/1/2026	54	53	53	52			56	53	49	66
8/1/2026	33	32	31	315	16	16	40	33	28	28
9/1/2026	28	27	25	6648	24	24	30	24
Municipality	Wiltshire	Wiltshire	England	England	England	England	Chippenham	Chippenham	Marlborough	Marlborough
Monitor Number	371	372	373	374	375	376	377	378	379	380

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-21 A	WCAN-21 B	WCAN-22-R A	WCAN-22-R B	WCAN-23 A	WCAN-23 B	WCAN-25 A	WCAN-25 B	WCAN-28 A	WCAN-28 B
1/1/2026	54	54			55	56	60	61	56	54
2/1/2026	44	43			49	49	52	52	52	51
3/1/2026	63	64			66	66	68	68	62	61
4/1/2026	35	36			37	37	42	43	40	40
5/1/2026	51	52			54	53	51	52	52	53
6/1/2026	28	30					29	31	22	22
7/1/2026	48	51			55	54	52	52	53	114
8/1/2026	29	31	37	35	32	30	32	33	22	24
9/1/2026	24	25	26	24			23	24
Municipality	Wiltshire	Wiltshire	Marlborough	Marlborough	Marlborough	Marlborough	Marlborough	Marlborough	Marlborough	Marlborough
Monitor Number	381	382	383	384	385	386	387	388	389	390

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-29 A	WCAN-29 B	WCAN-30 A	WCAN-30 B	WCAN-31 A	WCAN-31 B	WCAN-33-R A	WCAN-33-R B	WCAN-35 A	WCAN-35 B
1/1/2026	53	53	54	53	54	53			59	59
2/1/2026	42	41	46	43	46	44			49	51
3/1/2026	66	66	68	67	69	68	42	40	174	68
4/1/2026	38	38	39	38	42	40	43	41	19	43
5/1/2026	2599	194	53	52	54	54	51	47	757	51
6/1/2026	163	31	29	29	33	32	31	28	14	29
7/1/2026	54	54	54	54	56	56	51	47	27	52
8/1/2026	31	31	31	31	34	34	27	24	14	28
9/1/2026	24	24	25	25	27	27	22	19
Municipality	Ludgershall	Ludgershall	England	England	Tidworth	Tidworth	Cricklade	Cricklade	Marlborough	Marlborough
Monitor Number	391	392	393	394	395	396	397	398	399	400

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-36 A	WCAN-36 B	WCAN-39 A	WCAN-39 B	WCAN-4 A	WCAN-4 B	WCAN-40 A	WCAN-40 B	WCAN-41-R A	WCAN-41-R B
1/1/2026	52	52	55	53	53	53	54	52
2/1/2026	49	50	49	46	46	45	48	44
3/1/2026	68	68	68	66	72	73	70	68
4/1/2026	43	44	41	38	43	44	42	39
5/1/2026	54	55	52	50	55	55	53	52
6/1/2026	187	33	30	27	32	33	32	30
7/1/2026	54	55	53	51	53	53	52	52	43	43
8/1/2026	34	36	31	27	31	32	29	29	38	52
9/1/2026	27	27	27	24	29	30	28	26	36	34
Municipality	Swindon	Swindon	Wiltshire	Wiltshire	England	England	Maiden Bradley	Maiden Bradley	Dilton Marsh	Dilton Marsh
Monitor Number	401	402	403	404	405	406	407	408	409	410

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-42 A	WCAN-42 B	WCAN-43 A	WCAN-43 B	WCAN-44-R A	WCAN-44-R B	WCAN-46 A	WCAN-46 B	WCAN-47 A	WCAN-47 B
1/1/2026	56	56	54	53			60	58	61	59
2/1/2026	48	48	42	38			52	47	51	47
3/1/2026	69	69	67	65			73	71	68	66
4/1/2026	40	41	40	36			48	44	56	43
5/1/2026	52	52	53	49			56	54	54	51
6/1/2026	31	31	32	28			35	48	34	28
7/1/2026	52	52	52	47			54	52	54	61
8/1/2026	29	29	28	24			34	31	36	28
9/1/2026	25	25	24	22	41	41	1044	29	27	21
Municipality	Wiltshire	Wiltshire	Dilton Marsh	Dilton Marsh	England	England	Salisbury	Salisbury	England	England
Monitor Number	411	412	413	414	415	416	417	418	419	420

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-48 A	WCAN-48 B	WCAN-49 A	WCAN-49 B	WCAN-5 A	WCAN-5 B	WCAN-50 A	WCAN-50 B	WCAN-51 A	WCAN-51 B
1/1/2026	58	57	54	53	38	55	56	56	56	56
2/1/2026	50	48	43	40	25	44	48	47	48	48
3/1/2026	66	66	69	67	60	69	70	70	65	65
4/1/2026	45	93	39	37	25	42	44	43	39	39
5/1/2026	52	56	52	51	41	55	53	53	51	51
6/1/2026	31	31	32	29	21	33	30	30	29	29
7/1/2026	52	52	54	52	39	54	52	53	51	51
8/1/2026	33	33	33	30	19	33	180	28	30	29
9/1/2026	26	24	28	24	17	30	23	23	22	22
Municipality	Chippenham	Chippenham	Wiltshire	Wiltshire	Salisbury	Salisbury	Burcombe	Burcombe	Chippenham	Chippenham
Monitor Number	421	422	423	424	425	426	427	428	429	430

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-52 A	WCAN-52 B	WCAN-54 A	WCAN-54 B	WCAN-55 A	WCAN-55 B	WCAN-56 A	WCAN-56 B	WCAN-57 A	WCAN-57 B
1/1/2026	51	50	52	47	63	61	59	57	56	55
2/1/2026	39	37	49	44	56	54	55	54	52	52
3/1/2026	66	66	70	66	65	63	66	64	69	67
4/1/2026	68	67	45	41	39	34	43	162	45	43
5/1/2026	160	58	54	52	54	36	65	966	54	53
6/1/2026	28	27	33	31	37	21	36	175	33	32
7/1/2026	52	52	52	52	54	38	52	658	53	52
8/1/2026	27	27	34	33	38	20	32	980	34	33
9/1/2026	22	22			40	26
Municipality	Great Wishford	Great Wishford	Salisbury	Salisbury	Malmesbury	Malmesbury	Malmesbury	Malmesbury	Corsham	Corsham
Monitor Number	431	432	433	434	435	436	437	438	439	440

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-58 A	WCAN-58 B	WCAN-6 A	WCAN-6 B	WCAN-61 A	WCAN-61 B	WCAN-62 A	WCAN-62 B	WCAN-63 A	WCAN-63 B
1/1/2026	63	62	52	51	56	56	61	58	60	58
2/1/2026	53	52	43	42	46	45	55	52	57	55
3/1/2026	71	70	68	67	70	71	69	66	69	67
4/1/2026	49	49	41	40	39	39	44	39	51	43
5/1/2026	56	56	53	53	52	52	51	48	55	52
6/1/2026	33	31	32	31	29	28	29	27	36	30
7/1/2026	54	52	53	52	53	53	51	48	54	52
8/1/2026	36	33	29	28	28	28	28	26	32	29
9/1/2026	28	26	27	26	28	28	28	24	23	21
Municipality	Chippenham	Chippenham	England	England	Salisbury	Salisbury	Mere	Mere	Chippenham	Castle Combe
Monitor Number	441	442	443	444	445	446	447	448	449	450

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-66 A	WCAN-66 B	WCAN-67 A	WCAN-67 B	WCAN-68 A	WCAN-68 B	WCAN-69 A	WCAN-69 B	WCAN-70 A	WCAN-70 B
1/1/2026	55	54	53	55	48	50	54	55	59	60
2/1/2026	58	57	37	44	44	46	48	51	49	51
3/1/2026	80	78	66	70	66	66	66	68	69	73
4/1/2026	47	45	37	44	39	42	46	50	31	43
5/1/2026	55	53	51	54	51	52	52	95	38	53
6/1/2026	31	28	24	29	30	31	33	38	26	32
7/1/2026	54	52	47	53	51	51	22	26	64	47
8/1/2026	31	111	26	32	31	32	28	31	28	25
9/1/2026	28	24	21	27	23	25	24	283	27	32
Municipality	England	England	North Bradley	North Bradley	Chippenham	Chippenham	Corsham	Corsham	Salisbury	Salisbury
Monitor Number	451	452	453	454	455	456	457	458	459	460

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-73 A	WCAN-73 B	WCAN-75 A	WCAN-75 B	WCAN-76 A	WCAN-76 B	WCAN-77 A	WCAN-77 B	WCAN-78 A	WCAN-78 B
1/1/2026	67	66	53	54	52	52	53	52	55	54
2/1/2026	62	61	47	51	41	42	39	38	49	46
3/1/2026	70	69	64	66	67	68	68	68	72	70
4/1/2026	48	47	38	42	39	42	39	38	43	42
5/1/2026	52	52	72	54	52	53	53	52	54	53
6/1/2026	31	31	32	34	28	30	31	28	33	33
7/1/2026	53	53	51	52	49	51	53	52	54	54
8/1/2026	33	34	30	33	27	28	30	29	29	28
9/1/2026			22	24			29	29	27	26
Municipality	Malmesbury	Malmesbury	Corsham	Corsham	Malmesbury	Salisbury	Salisbury	Salisbury	Woodfalls	Woodfalls
Monitor Number	461	462	463	464	465	466	467	468	469	470

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-79 A	WCAN-79 B	WCAN-8 A	WCAN-8 B	WCAN-80 A	WCAN-80 B	WCAN-81 A	WCAN-81 B	WCAN-82 A	WCAN-82 B
1/1/2026	51	47			59	57	55	54	53	53
2/1/2026	44	41	32	31	51	47	44	41	43	41
3/1/2026	70	68	67	67	71	68	68	67	65	64
4/1/2026	42	40	38	38	46	43	43	41	39	37
5/1/2026	54	54	52	52	52	54	53	52	51	49
6/1/2026	32	32	29	29	32	500	31	29	31	29
7/1/2026	54	54	51	51	53	52	53	53	52	52
8/1/2026	30	29	28	27	33	31	30	29	88	29
9/1/2026	33	112					25	24	24	23
Municipality	England	England	Salisbury	Salisbury	Trowbridge	Trowbridge	Salisbury	Salisbury	Wiltshire	Wiltshire
Monitor Number	471	472	473	474	475	476	477	478	479	480

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-84 A	WCAN-84 B	WCAN-85 A	WCAN-85 B	WCAN-86 A	WCAN-86 B	WCAN-87 A	WCAN-87 B	WCAN-88 A	WCAN-88 B
1/1/2026	63	62	65	65	58	46	54	53	55	55
2/1/2026	54	54	54	54	54	39	42	40	52	52
3/1/2026	72	71	69	69	69	61	66	65	68	68
4/1/2026	46	45	51	49	34	23	29	27	43	43
5/1/2026	54	54	55	54	55	47			53	53
6/1/2026	34	34	36	33	32	23			33	32
7/1/2026	53	54	54	54	53	42	52	52	53	53
8/1/2026	31	32	34	33	35	24	28	27	33	32
9/1/2026	27	27	28	27	28	18	23	22	26	25
Municipality	Yarnbrook	Yarnbrook	England	England	Chippenham	Chippenham	Amesbury	Amesbury	Swindon	Swindon
Monitor Number	481	482	483	484	485	486	487	488	489	490

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-89 A	WCAN-89 B	WCAN-9 A	WCAN-9 B	WCAN-90 A	WCAN-90 B	WCAN-91-R-2 A	WCAN-91-R-2 B	WCAN-92 A	WCAN-92 B
1/1/2026	55	52	60	58	57	56			58	58
2/1/2026	53	51	54	52	51	48			48	49
3/1/2026	69	66	69	67	68	68			70	71
4/1/2026	43	39	51	47	48	46			41	41
5/1/2026	53	52	55	53	55	54			963	52
6/1/2026	30	28	37	33	37	36			29	181
7/1/2026	54	52	54	186	55	54	18	18	51	1171
8/1/2026	32	30	39	35	37	35	36	37	29	279
9/1/2026	24	23	31	27	27	26	29	29	27	6419
Municipality	Swindon	Swindon	Chippenham	Chippenham	Chippenham	Chippenham	Chippenham	Chippenham	Salisbury	Salisbury
Monitor Number	491	492	493	494	495	496	497	498	499	500

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-94 A	WCAN-94 B	WCAN-95 A	WCAN-95 B	WCAN-96 A	WCAN-96 B	WCAN-97 A	WCAN-97 B	WCAN-98 A	WCAN-98 B
1/1/2026	55	55	56	56	33	33	57	57	55	58
2/1/2026	42	42	52	52	19	19	46	45	44	50
3/1/2026	69	70	70	72	48	48	67	67	65	68
4/1/2026	39	39	41	43	20	21	41	42	41	46
5/1/2026	52	52	49	51	29	29	1986	53	52	1429
6/1/2026	28	28	32	32	20	20	31	31	32	330
7/1/2026	35	62	54	54	39	163	63	52	52	53
8/1/2026	28	26	31	31	17	18	32	32	33	37
9/1/2026	26	24	29	28	11	12			24	28
Municipality	Salisbury	Salisbury	Whiteparish	Whiteparish	Salisbury	Salisbury	England	England	Chippenham	Chippenham
Monitor Number	501	502	503	504	505	506	507	508	509	510

monthly averages PM 2 point 5  in micrograms per cubic meter	WCAN-99 A	WCAN-99 B	Wetherby (St James’s Street) A	Wetherby (St James’s Street) B	Wetherby (Victoria Street) A	Wetherby (Victoria Street) B	Whaley Bridge A	Whaley Bridge B	Windmill Hill A	Windmill Hill B
1/1/2026	57	57	14	14	14	14	57	45	68	68
2/1/2026	44	45					53	38	64	64
3/1/2026	69	70					57	51	63	61
4/1/2026	39	41			54	54	38	25	51	51
5/1/2026	54	53	36	38	46	46	38	27	41	39
6/1/2026	32	32	32	33	32	32	23	16	29	24
7/1/2026	53	54	51	52	52	51	47	36	56	52
8/1/2026	32	32	47	49	49	49	34	26	51	44
9/1/2026	33	33	33	31	33	32			28	28
Municipality	Landford	Landford	Wetherby	Wetherby	Wetherby	Wetherby	Whaley Bridge	Whaley Bridge	Hexham	Hexham
Monitor Number	511	512	513	514	515	516	517	518	519	520