Tap WaterIndex

← Pennsylvania

Tap water quality report

Lock Haven, PA

EPA monitoring detected 15 contaminants across the 2 water suppliers serving Lock Haven. 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.

2
water suppliers
10,025
people served
15
contaminants found
Pennsylvania rankings Lead in Pennsylvania PFAS in Pennsylvania

What was found in Lock Haven'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
863.6 µg/L 22%
of the EPA limit 4000 µg/L
Highest in the city: CENT CLINTON CO WATER FIL AUTH · 25 people · 2019
1/2 SYR4
Nitrate
200 µg/L 2%
of the EPA limit 10000 µg/L
Highest in the city: CENT CLINTON CO WATER FIL AUTH · 25 people · 2019
1/2 SYR4
Copper
110.9 µg/L 8.5%
of the EPA limit 1300 µg/L
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2019
1/2 SYR4
TTHM
53.91 µg/L 67%
of the EPA limit 80 µg/L
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2019
1/2 SYR4
Chloroform
47.185 µg/L
No EPA limit set
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
46.52 µg/L 78%
of the EPA limit 60 µg/L
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2019
1/2 SYR4
Dichloroacetic Acid
18.805 µg/L
No EPA limit set
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2019
1/2 SYR4
Barium
16.95 µg/L 0.8%
of the EPA limit 2000 µg/L
Highest in the city: CENT CLINTON CO WATER FIL AUTH · 25 people · 2019
1/2 SYR4
Trichloroacetic Acid
16.765 µg/L
No EPA limit set
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2019
1/2 SYR4
Lead
15.78 µg/L 105%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2019
1/2 SYR4
Bromodichloromethane
7.06 µg/L
No EPA limit set
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2019
1/2 SYR4
Dibromoacetic Acid
2.8 µg/L
No EPA limit set
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2019
1/2 SYR4
Dibromochloromethane
1.665 µg/L
No EPA limit set
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2019
1/2 SYR4
Monochloroacetic Acid
1.2 µg/L
No EPA limit set
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2019
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: CITY OF LOCK HAVEN WATER DEPT · 10,000 people · 2025
Highest in the city: 0.0050 mg/L — CENT CLINTON CO WATER FIL AUTH · 25 people · 2001
2/2 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 Lock Haven

SupplierPopulation served
CITY OF LOCK HAVEN WATER DEPT 10,000
CENT CLINTON CO WATER FIL AUTH 25

Frequently asked questions about Lock Haven tap water

Is Lock Haven tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Lock Haven. 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 Lock Haven?

2 public water suppliers report drinking-water monitoring for Lock Haven, Pennsylvania to the EPA. Each is listed above with its population served.

What contaminants are in Lock Haven's water?

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