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Tap water quality report

Chester, PA

EPA monitoring detected 22 contaminants across the 1 water supplier serving Chester. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
140,437
people served
22
contaminants found
Pennsylvania rankings Lead in Pennsylvania PFAS in Pennsylvania

What was found in Chester's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
9030 µg/L 90%
of the EPA limit 10000 µg/L
 1/1 SYR4
Copper
1400 µg/L 108%
of the EPA limit, in the worst sample — 1300 µg/L
 1/1 SYR4
Fluoride
779 µg/L 19%
of the EPA limit 4000 µg/L
 1/1 SYR4
Total Haloacetic Acids (HAA5)
102 µg/L 170%
of the EPA limit, in the worst sample — 60 µg/L
 1/1 SYR4
TTHM
92.5 µg/L 116%
of the EPA limit, in the worst sample — 80 µg/L
 1/1 SYR4
Chloroform
84.4 µg/L
No EPA limit set
 1/1 SYR4
Lead
81 µg/L 540%
of the EPA limit, in the worst sample — 15 µg/L
 1/1 SYR4
Dichloroacetic Acid
33 µg/L
No EPA limit set
 1/1 SYR4
Barium
31 µg/L 1.6%
of the EPA limit 2000 µg/L
 1/1 SYR4
Trichloroacetic Acid
30 µg/L
No EPA limit set
 1/1 SYR4
Bromodichloromethane
17 µg/L
No EPA limit set
 1/1 SYR4
Monochloroacetic Acid
4.8 µg/L
No EPA limit set
 1/1 SYR4
Dibromochloromethane
3.1 µg/L
No EPA limit set
 1/1 SYR4
Monobromoacetic Acid
2.6 µg/L
No EPA limit set
 1/1 SYR4
Dibromoacetic Acid
1.3 µg/L
No EPA limit set
 1/1 SYR4
Atrazine
0.7300 µg/L 24%
of the EPA limit 3 µg/L
 1/1 SYR4
2,4-D
0.1800 µg/L 0.3%
of the EPA limit 70 µg/L
 1/1 SYR4
Lead
0.0123 mg/L 82%
of the EPA limit 0.0150 mg/L
 1/1 LCR
PFOA
0.0051 µg/L
No EPA limit set
 1/1 UCMR-5
PFBS
0.0045 µg/L
No EPA limit set
 1/1 UCMR-5
Pfpea
0.0041 µg/L
No EPA limit set
 1/1 UCMR-5
Pfhxa
0.0039 µg/L
No EPA limit set
 1/1 UCMR-5
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Chester

SupplierPopulation served
CHESTER WATER AUTHORITY 140,437

Frequently asked questions about Chester tap water

Is Chester tap water safe to drink?

EPA testing detected 22 contaminants in the water serving Chester. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Chester?

1 public water supplier report drinking-water monitoring for Chester, Pennsylvania to the EPA. Each is listed above with its population served.

What contaminants are in Chester's water?

The contaminants EPA monitoring detected in Chester include Nitrate, Copper, Fluoride, Total Haloacetic Acids (HAA5), TTHM. The full list, with the highest level found and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.