Tap WaterIndex

← Pennsylvania

Tap water quality report

Mars, PA

EPA monitoring detected 17 contaminants across the 2 water suppliers serving Mars. 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
10,656
people served
17
contaminants found
Pennsylvania rankings Lead in Pennsylvania PFAS in Pennsylvania

What was found in Mars'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
Copper
266.05 µg/L 20%
of the EPA limit 1300 µg/L
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
Highest in the city: 507.35 µg/L — MARS BOROUGH WATER WORKS · 1,956 people · 2019
2/2 SYR4
Fluoride
256.95 µg/L 6.4%
of the EPA limit 4000 µg/L
Highest in the city: MARS BOROUGH WATER WORKS · 1,956 people · 2018
1/2 SYR4
Barium
218 µg/L 11%
of the EPA limit 2000 µg/L
Highest in the city: MARS BOROUGH WATER WORKS · 1,956 people · 2018
1/2 SYR4
Nitrate
160 µg/L 1.6%
of the EPA limit 10000 µg/L
Highest in the city: MARS BOROUGH WATER WORKS · 1,956 people · 2019
1/2 SYR4
TTHM
79.585 µg/L 99%
of the EPA limit 80 µg/L
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
2/2 SYR4
Chloroform
48.97 µg/L
No EPA limit set
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
2/2 SYR4
Bromodichloromethane
26.4 µg/L
No EPA limit set
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
24.62 µg/L 41%
of the EPA limit 60 µg/L
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
2/2 SYR4
Dibromochloromethane
19.82 µg/L
No EPA limit set
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
2/2 SYR4
Lead
1.84 µg/L 12%
of the EPA limit 15 µg/L
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
Highest in the city: 12.5 µg/L — MARS BOROUGH WATER WORKS · 1,956 people · 2019
2/2 SYR4
Dichloroacetic Acid
12.13 µg/L
No EPA limit set
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
2/2 SYR4
Trichloroacetic Acid
9.2 µg/L
No EPA limit set
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
2/2 SYR4
Bromoform
8.205 µg/L
No EPA limit set
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
2/2 SYR4
cis-1,2-Dichloroethylene
3.312 µg/L 4.7%
of the EPA limit 70 µg/L
Highest in the city: MARS BOROUGH WATER WORKS · 1,956 people · 2019
1/2 SYR4
Dibromoacetic Acid
2.9 µg/L
No EPA limit set
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
2/2 SYR4
Monochloroacetic Acid
1.202 µg/L
No EPA limit set
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2019
Highest in the city: 2.33 µg/L — MARS BOROUGH WATER WORKS · 1,956 people · 2019
2/2 SYR4
Lead
0.00059 mg/L 3.9%
of the EPA limit 0.0150 mg/L
Main supplier: MUNICIPAL WATER AUTH ADAMS TWP · 8,700 people · 2025
Highest in the city: 0.0030 mg/L — MARS BOROUGH WATER WORKS · 1,956 people · 1996
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 Mars

SupplierPopulation served
MUNICIPAL WATER AUTH ADAMS TWP 8,700
MARS BOROUGH WATER WORKS 1,956

Frequently asked questions about Mars tap water

Is Mars tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Mars. 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 Mars?

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

What contaminants are in Mars's water?

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