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Tap water quality report

Jefferson, PA

EPA monitoring detected 19 contaminants across the 1 water supplier serving Jefferson. 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
40,200
people served
19
contaminants found
Pennsylvania rankings Lead in Pennsylvania PFAS in Pennsylvania

What was found in Jefferson'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
Fluoride
950 µg/L 24%
of the EPA limit 4000 µg/L
 1/1 SYR4
Nitrate
680 µg/L 6.8%
of the EPA limit 10000 µg/L
 1/1 SYR4
TTHM
117 µg/L 146%
of the EPA limit, in the worst sample — 80 µg/L
 1/1 SYR4
Chloroform
80 µg/L
No EPA limit set
 1/1 SYR4
Copper
63 µg/L 4.8%
of the EPA limit 1300 µg/L
 1/1 SYR4
Total Haloacetic Acids (HAA5)
60 µg/L 100%
of the EPA limit 60 µg/L
 1/1 SYR4
Barium
40.9 µg/L 2%
of the EPA limit 2000 µg/L
 1/1 SYR4
Bromodichloromethane
30.5 µg/L
No EPA limit set
 1/1 SYR4
Dibromochloromethane
28 µg/L
No EPA limit set
 1/1 SYR4
Dichloroacetic Acid
27.6 µg/L
No EPA limit set
 1/1 SYR4
Trichloroacetic Acid
19.2 µg/L
No EPA limit set
 1/1 SYR4
Lead
10.4 µg/L 69%
of the EPA limit 15 µg/L
 1/1 SYR4
Cyanide
6 µg/L 3%
of the EPA limit 200 µg/L
 1/1 SYR4
Monobromoacetic Acid
5.48 µg/L
No EPA limit set
 1/1 SYR4
Monochloroacetic Acid
4.63 µg/L
No EPA limit set
 1/1 SYR4
Dibromoacetic Acid
3.89 µg/L
No EPA limit set
 1/1 SYR4
Bromoform
2.6 µg/L
No EPA limit set
 1/1 SYR4
Antimony, Total
0.5000 µg/L 8.3%
of the EPA limit 6 µg/L
 1/1 SYR4
Lead
0.00092 mg/L 6.1%
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 Jefferson

SupplierPopulation served
SOUTHWESTERN PA WATER AUTH 40,200

Frequently asked questions about Jefferson tap water

Is Jefferson tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Jefferson. 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 Jefferson?

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

What contaminants are in Jefferson's water?

The contaminants EPA monitoring detected in Jefferson include Fluoride, Nitrate, TTHM, Chloroform, Copper. 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.