Is King of Prussia, PA Tap Water Safe? Quality & Contaminants

What was found in King of Prussia'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.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	1100 µg/L 11% of the EPA limit 10000 µg/L Main supplier: WARWICK WATER WORKS · 98 people · 2019	1/1	SYR4
Copper	419.8 µg/L 32% of the EPA limit 1300 µg/L Main supplier: WARWICK WATER WORKS · 98 people · 2019	1/1	SYR4
TTHM	15.47 µg/L 19% of the EPA limit 80 µg/L Main supplier: WARWICK WATER WORKS · 98 people · 2019	1/1	SYR4
Total Haloacetic Acids (HAA5)	6.612 µg/L 11% of the EPA limit 60 µg/L Main supplier: WARWICK WATER WORKS · 98 people · 2019	1/1	SYR4
Chloroform	6.58 µg/L No EPA limit set Main supplier: WARWICK WATER WORKS · 98 people · 2019	1/1	SYR4
Lead	5.55 µg/L 37% of the EPA limit 15 µg/L Main supplier: WARWICK WATER WORKS · 98 people · 2019	1/1	SYR4
Chromium	4.9 µg/L 4.9% of the EPA limit 100 µg/L Main supplier: WARWICK WATER WORKS · 98 people · 2018	1/1	SYR4
Bromodichloromethane	4.19 µg/L No EPA limit set Main supplier: WARWICK WATER WORKS · 98 people · 2019	1/1	SYR4
Dibromochloromethane	3.28 µg/L No EPA limit set Main supplier: WARWICK WATER WORKS · 98 people · 2019	1/1	SYR4
Dibromoacetic Acid	2 µg/L No EPA limit set Main supplier: WARWICK WATER WORKS · 98 people · 2019	1/1	SYR4
Dichloroacetic Acid	2 µg/L No EPA limit set Main supplier: WARWICK WATER WORKS · 98 people · 2019	1/1	SYR4
Bromoform	1.55 µg/L No EPA limit set Main supplier: WARWICK WATER WORKS · 98 people · 2019	1/1	SYR4
Lead	0.6960 mg/L 4640% above the EPA limit of 0.0150 mg/L Main supplier: WARWICK WATER WORKS · 98 people · 2007	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 King of Prussia

Supplier	Population served
WARWICK WATER WORKS	98

Frequently asked questions about King of Prussia tap water

Is King of Prussia tap water safe to drink?

EPA testing detected 13 contaminants in the water serving King of Prussia. 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 King of Prussia?

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

What contaminants are in King of Prussia's water?

The contaminants EPA monitoring detected in King of Prussia include Nitrate, Copper, TTHM, Total Haloacetic Acids (HAA5), 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.