Is Mechanicsburg, PA Tap Water Safe? Quality & Contaminants

What was found in Mechanicsburg'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	5160 µg/L 52% of the EPA limit 10000 µg/L Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2019	2/3	SYR4
Barium	1175 µg/L 59% of the EPA limit 2000 µg/L Highest in the city: SILVER SPRING COUNTRY ESTATES · 110 people · 2015	2/3	SYR4
Fluoride	732 µg/L 18% of the EPA limit 4000 µg/L Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2019	3/3	SYR4
Copper	302.85 µg/L 23% of the EPA limit 1300 µg/L Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2019	3/3	SYR4
TTHM	41.22 µg/L 52% of the EPA limit 80 µg/L Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2019	2/3	SYR4
Chloroform	32.965 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2019	3/3	SYR4
Total Haloacetic Acids (HAA5)	24.12 µg/L 40% of the EPA limit 60 µg/L Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2019	2/3	SYR4
Selenium	14 µg/L 28% of the EPA limit 50 µg/L Highest in the city: SILVER SPRING COUNTRY ESTATES · 110 people · 2015	1/3	SYR4
Trichloroacetic Acid	9.405 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2019	1/3	SYR4
Dichloroacetic Acid	9.02 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2019	1/3	SYR4
Bromodichloromethane	8.265 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2019	2/3	SYR4
Cyanide	7 µg/L 3.5% of the EPA limit 200 µg/L Highest in the city: REGENCY WOODS MHP · 450 people · 2018	1/3	SYR4
Arsenic	5.9 µg/L 59% of the EPA limit 10 µg/L Highest in the city: SILVER SPRING COUNTRY ESTATES · 110 people · 2015	1/3	SYR4
Chromium	5.72 µg/L 5.7% of the EPA limit 100 µg/L Highest in the city: SILVER SPRING COUNTRY ESTATES · 110 people · 2015	2/3	SYR4
Lead	3.9 µg/L 26% of the EPA limit 15 µg/L Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2019	1/3	SYR4
Dibromochloromethane	2.4 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2019	2/3	SYR4
PFOS	0.0104 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2024	1/3	UCMR-5
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2025 Highest in the city: 0.0080 mg/L — REGENCY WOODS MHP · 450 people · 1996	3/3	LCR
PFOA	0.0049 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2024	1/3	UCMR-5
Pfpea	0.0034 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2024	1/3	UCMR-5
PFBS	0.0032 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO WEST · 105,127 people · 2024	1/3	UCMR-5

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 Mechanicsburg

Supplier	Population served
PA AMERICAN WATER CO WEST	105,127
REGENCY WOODS MHP	450
SILVER SPRING COUNTRY ESTATES	110

Frequently asked questions about Mechanicsburg tap water

Is Mechanicsburg tap water safe to drink?

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

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

What contaminants are in Mechanicsburg's water?

The contaminants EPA monitoring detected in Mechanicsburg include Nitrate, Barium, Fluoride, Copper, TTHM. 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.