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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 level at the main supplier 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 level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
946 µg/L 24%
of the EPA limit 4000 µg/L
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Nitrate
680 µg/L 6.8%
of the EPA limit 10000 µg/L
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
TTHM
101.5 µg/L 127%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Chloroform
71 µg/L
No EPA limit set
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Copper
54.395 µg/L 4.2%
of the EPA limit 1300 µg/L
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
45.04 µg/L 75%
of the EPA limit 60 µg/L
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Barium
40.9 µg/L 2%
of the EPA limit 2000 µg/L
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Dichloroacetic Acid
27.125 µg/L
No EPA limit set
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Bromodichloromethane
27.1 µg/L
No EPA limit set
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Trichloroacetic Acid
18.865 µg/L
No EPA limit set
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Dibromochloromethane
11.74 µg/L
No EPA limit set
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Cyanide
6 µg/L 3%
of the EPA limit 200 µg/L
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Monobromoacetic Acid
5.32 µg/L
No EPA limit set
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Lead
5.27 µg/L 35%
of the EPA limit 15 µg/L
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Monochloroacetic Acid
4.63 µg/L
No EPA limit set
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Dibromoacetic Acid
3.5825 µg/L
No EPA limit set
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Bromoform
2 µg/L
No EPA limit set
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Antimony, Total
0.5000 µg/L 8.3%
of the EPA limit 6 µg/L
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2019
1/1 SYR4
Lead
0.00092 mg/L 6.1%
of the EPA limit 0.0150 mg/L
Main supplier: SOUTHWESTERN PA WATER AUTH · 40,200 people · 2025
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 95th percentile of the system's samples — 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 level at the main supplier 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.