Air quality

In this section

Air Quality monitoring data

The reporting tools below can be used to analyse air quality data across the district for the last five years. Use our interactive tool to explore the data and view the data in table format by opening the blue boxes underneath.

Under Part IV of the Environment Act 1995 we have a legal duty to review and assess current and future air quality against air quality objectives established in the National Air Quality Strategy.

The data on this page has been approved and verified. To view live air quality data across Sussex, visit the Sussex Air website or the UK Air website. Live air quality data can also be accessed in real time on the Brighton & Hove and Sussex Real-Time Air Quality Portal.

To view UK Air Quality Limits, visit the Department for Environment Food and Rural Affairs (DEFRA) website.

View the data in table format

To view the data as tables, a format that is fully navigable by keyboard and screen reader, click the button below/open the blue boxes below.

The tables show the annual and monthly averages for Nitrogen Dioxide (NO2) and Particulate Matter (PM) in different areas of the District up to December 2023. For live data, visit the Sussex Air website.

If you have further questions about the data or how it is presented, please email Environmental Health.

Annual Average Air Quality

Site Name	2019	2020	2021	2022	2023	UK objective
Billingshurst 1	26.2	23.8	22.2	20.3	19.7	40
Broadbridge_Heath 1					10.2	40
Cowfold AQMS	23.6	23.4	20.3	21	24.6	40
Cowfold 9n.1					18.2	40
Cowfold 9N		19.3	18.3	18.7		40
Cowfold 8n	11.6	10.9	10.5	10.3	8.9	40
Cowfold 7n	36.1	30.2	31.2	31.7	28.3	40
Cowfold 6N	23.5	21.7	20.5	20.3	19.6	40
Cowfold 5n	22.5	20.4	21.3	20.3	18.7	40
Cowfold 4	26.8	22.5	22.2	20.3	19.5	40
Cowfold 3	30.7	24.6	26.5	25.5	24.1	40
Cowfold 1,2	31.6	26.8	26.5	26.4	24.1	40
Henfield 1n	22.2	19.9	20.9	18.2	18.2	40
Horsham Park Way AQMS	24.4	18.8	21.1	17.7	16.2	40
N. Horsham 3N					26.2	40
N. Horsham 2N	17.3	15.8	14.6	14.1	14.1	40
N. Horsham 1N	19.3	16.8	17.6	13.9		40
Horsham 9N_1					20.3	40
Horsham 9N	26.5	22.1	23.3	24.1		40
Horsham 8N	21.9	19.1	20.7	19.9	18.7	40
Horsham 7N	23	18.6	19.4	18.9	16.6	40
Horsham 6N	21.5	18.2	19.5	17.6	15	40
Horsham 5N	25.2	21	22.7	21.6	20.4	40
Horsham 4N	10.2	9.1	9	8.7		40
Horsham 3N	12.5	9.5	9.9	8.8	7.634409	40
Horsham 1N	26.4	21.6	23.2	22.6	20.9	40
Horsham 12.1					20.1	40
Horsham 12		30.5	33.4	29.7		40
Horsham 11n	26.6					40
Pulborough 3					14.7	40
Pulborough 2	17.9	15.7	16.7	16.1	15.8	40
Pulborough 1	28.3					40
A29_Pulborough5					6.3	40
A29_Pulborough4					9.2	40
A29_Pulborough3					9.069163	40
A29_Pulborough1					8.1	40
Southwater 1	23.5	21.1	21.7	19.4	19	40
Steyning 4N	20.1	16.2	19	18.5	18.2	40
Storrington AURN	22	17.4	20.1	17.6	17.4	40
Storrington 7	18.4	15.6	17.6	17.7	18.8	40
Storrington 6	18.8	14.8	17.1	17.4	17.9	40
Storrington 5	23.3	18.7	19.9	19	19.2	40
Storrington 4	29.7	25.5	25.9	26.7	24.5	40
Storrington 3	28.3	23.3	24.8	23.7	21.8	40
Storrington 18n	16	13.4	18.1	15.4	13.7	40
Storrington 15n	16.9	14.9	15.4	14.6	14.7	40
Storrington 14	33.4	27.8	25.8	26.3	23.5	40
Storrington 13n	25.6	21.4	23.1	23	21.1	40
Storrington 12n	26	20	23	22.4	20.9	40
Storrington 11n	29.8	25	26.5	25.9	24.8	40
Storrington 1	38.9	31.6	34.3	32.9	32.9	40
Storrington 19n	47.7	38.4	39.6	38.1	37	40
Storrington 17n	11.2	9.8	10	9.6	8.2	40
Storrington 16n	21.6	18.9	19.2	18.4	17.5	40

Site Name	2019	2020	2021	2022	2023	UK objective
Park Way AQMS	19.3	15.7	17.5	19.3	20.5	40
Storrington AURN				14	13.7	40

Applied filters: Pollutant is PM10 Particulate Matter is PM10

Monthly Average Air Quality

MeasurementDateGMT - Year	MeasurementDateGMT - Month	Average of ug/m3
2017	January	36.7
2017	February	27.9
2017	March	25.6
2017	April	24.6
2017	May	25.2
2017	June	28.8
2017	July	30.0
2017	August	26.8
2017	September	27.9
2017	October	28.2
2017	November	34.9
2017	December	36.5
2018	January	33.9
2018	February	27.8
2018	March	35.2
2018	April	37.4
2018	May	28.4
2018	June	20.5
2018	July	31.9
2018	August	24.6
2018	September	21.5
2018	October	25.1
2018	November	26.8
2018	December	19.5
2019	January	27.3
2019	February	33.3
2019	March	21.9
2019	April	22.9
2019	May	21.9
2019	June	18.5
2019	July	16.8
2019	August	21.7
2019	September	21.0
2019	October	23.2
2019	November	29.3
2019	December	25.7
2020	January	27.7
2020	February	21.2
2020	March	23.3
2020	April	23.7
2020	May	14.2
2020	June	18.2
2020	July	20.9
2020	August	27.6
2020	September	26.9
2020	October	27.8
2020	November	25.3
2020	December	23.1
2021	January	21.2
2021	February	21.5
2021	March	21.3
2021	April	20.0
2021	May	16.8
2021	June	21.1
2021	July	15.8
2021	August	13.2
2021	September	21.8
2021	October	21.5
2021	November	25.9
2021	December	23.0
2022	January	27.8
2022	February	20.9
2022	March	23.2
2022	April	14.1
2022	May	15.7
2022	June	15.2
2022	July	18.2
2022	August	18.8
2022	September	14.1
2022	October	24.9
2022	November	27.3
2022	December	31.0
2023	January	29.5
2023	February	28.4
2023	March	30.5
2023	April	28.5
2023	May	19.7
2023	June	29.1
2023	July	34.8
2023	August	22.8
2023	September	19.1
2023	October	17.7
2023	November	18.1
2023	December	16.9

Applied filters: Species is NO2 Site Name is Cowfold

MeasurementDateGMT - Year	MeasurementDateGMT - Month	Average of ug/m3
2017	January	41.8
2017	February	28.5
2017	March	26.7
2017	April	27.3
2017	May	21.3
2017	June	20.3
2017	July	18.5
2017	August	19.0
2017	September	23.2
2017	October	21.8
2017	November	34.8
2017	December	31.3
2018	January	25.5
2018	February	31.6
2018	March	28.0
2018	April	25.0
2018	May	25.6
2018	June	18.3
2018	July	23.6
2018	August	20.3
2018	September	24.8
2018	October	29.7
2018	November	26.3
2018	December	25.5
2019	January	39.0
2019	February	32.3
2019	March	22.7
2019	April	34.3
2019	May	24.8
2019	June	19.7
2019	July	20.2
2019	August	18.2
2019	September	17.9
2019	October	16.8
2019	November	23.9
2019	December	24.8
2020	January	25.1
2020	February	17.3
2020	March	20.6
2020	April	17.0
2020	May	13.1
2020	June	14.8
2020	July	14.4
2020	August	19.3
2020	September	19.2
2020	October	17.2
2020	November	22.0
2020	December	24.9
2021	January	22.4
2021	February	18.9
2021	March	22.9
2021	April	22.6
2021	May	16.5
2021	June	17.4
2021	July	17.7
2021	August
2021	September
2021	October	16.5
2021	November	27.6
2021	December	24.6
2022	January	13.7
2022	February
2022	March	21.4
2022	April	17.2
2022	May	16.6
2022	June	13.9
2022	July	16.8
2022	August	16.2
2022	September	18.5
2022	October	16.3
2022	November	17.4
2022	December	30.0
2023	January	24.1
2023	February	21.0
2023	March	16.9
2023	April	18.8
2023	May	15.1
2023	June	12.3
2023	July	10.2
2023	August	12.0
2023	September	15.7
2023	October	15.2
2023	November	18.8
2023	December	14.5

Applied filters: Species is NO2 Site Name is Horsham Park Way

MeasurementDateGMT - Year	MeasurementDateGMT - Month	Average of ug/m3
2017	January	26.6
2017	February	21.7
2017	March	18.9
2017	April
2017	May	15.0
2017	June	17.9
2017	July	15.0
2017	August	15.5
2017	September	16.4
2017	October	16.2
2017	November	19.7
2017	December	15.4
2018	January	14.5
2018	February	15.1
2018	March	16.8
2018	April	15.8
2018	May	17.4
2018	June	15.7
2018	July	18.9
2018	August	15.5
2018	September	15.4
2018	October	14.0
2018	November	16.3
2018	December	16.5
2019	January	23.4
2019	February	27.6
2019	March	20.9
2019	April	29.6
2019	May	16.8
2019	June	15.5
2019	July	15.6
2019	August	18.3
2019	September	14.1
2019	October	15.2
2019	November	15.7
2019	December	16.9
2020	January	16.8
2020	February	15.6
2020	March	16.5
2020	April	22.7
2020	May	15.3
2020	June	13.1
2020	July	12.0
2020	August	16.7
2020	September	14.9
2020	October	12.2
2020	November	19.5
2020	December	13.2
2021	January	16.1
2021	February	20.1
2021	March	22.4
2021	April	20.6
2021	May	15.6
2021	June	17.4
2021	July	19.1
2021	August	12.4
2021	September
2021	October	16.2
2021	November	16.8
2021	December	15.6
2022	January	22.1
2022	February	21.8
2022	March	23.7
2022	April	19.8
2022	May	16.0
2022	June	17.5
2022	July	19.0
2022	August	19.4
2022	September	17.4
2022	October	18.7
2022	November	17.9
2022	December	19.6
2023	January	18.7
2023	February	21.5
2023	March	17.0
2023	April	16.8
2023	May	23.7
2023	June	26.7
2023	July	19.3
2023	August	17.0
2023	September	22.6
2023	October	21.9
2023	November
2023	December

Applied filters: Species is PM10 Site Name is Horsham Park Way

MeasurementDateGMT - Year	MeasurementDateGMT - Month	Average of ug/m3
2017	January	35.3
2017	February	23.2
2017	March	20.8
2017	April	26.2
2017	May	23.1
2017	June	18.2
2017	July	16.6
2017	August	18.6
2017	September	20.2
2017	October	18.3
2017	November	26.6
2017	December	24.4
2018	January	18.9
2018	February	29.4
2018	March	24.0
2018	April	24.0
2018	May	26.4
2018	June	20.8
2018	July	21.6
2018	August	19.1
2018	September	23.3
2018	October	26.1
2018	November	23.3
2018	December	19.4
2019	January	31.1
2019	February	24.6
2019	March	19.5
2019	April	27.9
2019	May	23.6
2019	June	19.3
2019	July	19.1
2019	August	16.2
2019	September	17.9
2019	October	21.3
2019	November	23.7
2019	December	19.3
2020	January	19.9
2020	February	14.7
2020	March	16.8
2020	April	16.3
2020	May	14.2
2020	June	15.7
2020	July	13.9
2020	August	18.5
2020	September	21.0
2020	October	17.7
2020	November	17.4
2020	December	21.1
2021	January	20.1
2021	February	20.9
2021	March	22.8
2021	April	23.6
2021	May	16.8
2021	June	20.3
2021	July	17.6
2021	August	16.7
2021	September	21.7
2021	October	18.2
2021	November	24.2
2021	December	18.5
2022	January	25.3
2022	February	12.5
2022	March	23.9
2022	April	19.9
2022	May	17.4
2022	June	16.4
2022	July	18.4
2022	August	18.0
2022	September	20.5
2022	October	14.3
2022	November	13.8
2022	December	22.4
2023	January	21.0
2023	February	23.3
2023	March	16.6
2023	April	16.9
2023	May	19.0
2023	June	17.1
2023	July	13.2
2023	August	13.7
2023	September	16.4
2023	October	17.3
2023	November	18.0
2023	December	13.8

Applied filters: Species is NO2 Site Name is Storrington

MeasurementDateGMT - Year	MeasurementDateGMT - Month	Average of ug/m3
2017	January
2017	February
2017	March
2017	April
2017	May
2017	June
2017	July
2017	August
2017	September
2017	October
2017	November
2017	December
2018	January
2018	February
2018	March
2018	April
2018	May
2018	June
2018	July
2018	August
2018	September
2018	October
2018	November
2018	December
2019	January
2019	February
2019	March
2019	April
2019	May
2019	June
2019	July
2019	August
2019	September
2019	October
2019	November
2019	December
2020	January
2020	February
2020	March
2020	April
2020	May
2020	June
2020	July
2020	August
2020	September
2020	October
2020	November
2020	December
2021	January
2021	February
2021	March
2021	April
2021	May
2021	June
2021	July
2021	August
2021	September
2021	October
2021	November
2021	December
2022	January
2022	February
2022	March	12.1
2022	April	8.3
2022	May	6.5
2022	June	6.0
2022	July	5.1
2022	August	6.2
2022	September	5.3
2022	October	6.0
2022	November	6.9
2022	December	14.6
2023	January	10.5
2023	February	11.5
2023	March	8.3
2023	April	9.1
2023	May	7.7
2023	June	8.6
2023	July	5.0
2023	August	4.6
2023	September	7.0
2023	October	6.0
2023	November	6.5
2023	December	7.8

Applied filters: Species is PM25 Site Name is Storrington

MeasurementDateGMT - Year	MeasurementDateGMT - Month	Average of ug/m3
2017	January
2017	February
2017	March
2017	April
2017	May
2017	June
2017	July
2017	August
2017	September
2017	October
2017	November
2017	December
2018	January
2018	February
2018	March
2018	April
2018	May
2018	June
2018	July
2018	August
2018	September
2018	October
2018	November
2018	December
2019	January
2019	February
2019	March
2019	April
2019	May
2019	June
2019	July
2019	August
2019	September
2019	October
2019	November
2019	December
2020	January
2020	February
2020	March
2020	April
2020	May
2020	June
2020	July
2020	August
2020	September
2020	October
2020	November
2020	December
2021	January
2021	February
2021	March
2021	April
2021	May
2021	June
2021	July
2021	August
2021	September
2021	October
2021	November
2021	December
2022	January
2022	February
2022	March	21.6
2022	April	15.5
2022	May	12.7
2022	June	12.2
2022	July	11.8
2022	August	13.7
2022	September	11.3
2022	October	13.6
2022	November	13.4
2022	December	20.8
2023	January	16.0
2023	February	19.8
2023	March	15.1
2023	April	15.1
2023	May	14.2
2023	June	15.7
2023	July	10.4
2023	August	9.3
2023	September	13.2
2023	October	11.7
2023	November	12.4
2023	December	12.7

Applied filters: Species is PM10 Site Name is Storrington

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Air quality

In this section

Air Quality monitoring data

View the data in table format

Annual Average Air Quality

NO2 Annual Average

Fine Particulate Matter (PM2.5) Annual Average

Coarse Pariculate Matter (PM10) Annual Average

Monthly Average Air Quality

Cowfold Nitrogen Dioxide NO2 - monthly average

Horsham Nitrogen Dioxide NO2 - monthly average

Horsham Coarse Particules PM10 - monthly average

Storrington Nitrogen Dioxide NO2 - monthly average

Storrington Fine Particules PM2.5 - monthly average

Storrington Coarse Particules PM10 - monthly average