Air Quality in New Jersey

New Jersey has 16 counties with EPA air quality monitoring. Air quality is generally improving across the state, with an average of 262 "Good" days per county per year. The best air quality is in Atlantic (median AQI 35) and the most polluted is Camden (median AQI 44).

County	Median AQI	Max AQI	Good Days	Unhealthy Days	Trend	Top Pollutant
Atlantic	35	97	302	0	→ stable	Ozone
Bergen	40	156	267	10	↓ improving	Ozone
Camden	44	115	235	4	→ stable	Ozone
Cumberland	39	112	290	1	→ stable	Ozone
Essex	44	97	177	0	→ stable	PM2.5
Gloucester	41	129	265	8	→ stable	Ozone
Hudson	41	151	261	3	↓ improving	PM2.5
Hunterdon	41	100	266	0	→ stable	Ozone
Mercer	43	133	246	5	→ stable	Ozone
Middlesex	36	136	286	5	→ stable	Ozone
Monmouth	37	119	240	1	→ stable	Ozone
Morris	37	108	305	2	→ stable	Ozone
Ocean	41	140	280	4	→ stable	Ozone
Passaic	38	119	269	2	→ stable	PM2.5
Union	43	85	229	0	→ stable	PM2.5
Warren	36	108	284	2	→ stable	Ozone