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Tap water quality report

Downingtown, PA

EPA monitoring detected 21 contaminants across the 1 water supplier serving Downingtown. 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
9,900
people served
21
contaminants found
Pennsylvania rankings Lead in Pennsylvania PFAS in Pennsylvania

What was found in Downingtown'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
5530 µg/L 55%
of the EPA limit 10000 µg/L
 1/1 SYR4
Fluoride
1060 µg/L 27%
of the EPA limit 4000 µg/L
 1/1 SYR4
Copper
364 µg/L 28%
of the EPA limit 1300 µg/L
 1/1 SYR4
Total Haloacetic Acids (HAA5)
94.9 µg/L 158%
of the EPA limit, in the worst sample — 60 µg/L
 1/1 SYR4
TTHM
73.6 µg/L 92%
of the EPA limit 80 µg/L
 1/1 SYR4
Lead
69 µg/L 460%
of the EPA limit, in the worst sample — 15 µg/L
 1/1 SYR4
Chloroform
56 µg/L
No EPA limit set
 1/1 SYR4
Barium
47 µg/L 2.4%
of the EPA limit 2000 µg/L
 1/1 SYR4
Dichloroacetic Acid
32 µg/L
No EPA limit set
 1/1 SYR4
Trichloroacetic Acid
25 µg/L
No EPA limit set
 1/1 SYR4
Bromodichloromethane
15 µg/L
No EPA limit set
 1/1 SYR4
Dibromochloromethane
6.6 µg/L
No EPA limit set
 1/1 SYR4
Dibromoacetic Acid
2 µg/L
No EPA limit set
 1/1 SYR4
Bromoform
1.2 µg/L
No EPA limit set
 1/1 SYR4
Dichloromethane
0.8000 µg/L 16%
of the EPA limit 5 µg/L
 1/1 SYR4
Combined Uranium
0.4500 µg/L 1.5%
of the EPA limit 30 µg/L
 1/1 SYR4
PFOA
0.0042 µg/L
No EPA limit set
 1/1 UCMR-5
PFBS
0.0038 µg/L
No EPA limit set
 1/1 UCMR-5
Pfpea
0.0034 µg/L
No EPA limit set
 1/1 UCMR-5
Pfhxa
0.0031 µg/L
No EPA limit set
 1/1 UCMR-5
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 1/1 LCR
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 Downingtown

SupplierPopulation served
DOWNINGTOWN WATER AUTHORITY 9,900

Frequently asked questions about Downingtown tap water

Is Downingtown tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Downingtown. 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 Downingtown?

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

What contaminants are in Downingtown's water?

The contaminants EPA monitoring detected in Downingtown include Nitrate, Fluoride, Copper, 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.