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Tap water quality report

Charleston, ME

EPA monitoring detected 19 contaminants across the 2 water suppliers serving Charleston. 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
503
people served
19
contaminants found
Maine rankings Lead in Maine PFAS in Maine

What was found in Charleston'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
Nitrate
870.5 µg/L 8.7%
of the EPA limit 10000 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
Highest in the city: 1500 µg/L — FAITH BIBLE COLLEGE INTERNATIONAL · 35 people · 2019
2/2 SYR4
Nitrate-Nitrite
652 µg/L 6.5%
of the EPA limit 10000 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2017
Highest in the city: 1473 µg/L — FAITH BIBLE COLLEGE INTERNATIONAL · 35 people · 2015
2/2 SYR4
Copper
131 µg/L 10%
of the EPA limit 1300 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
Highest in the city: 340 µg/L — FAITH BIBLE COLLEGE INTERNATIONAL · 35 people · 2019
2/2 SYR4
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
Highest in the city: FAITH BIBLE COLLEGE INTERNATIONAL · 35 people · 2019
1/2 SYR4
Barium
4.5 µg/L 0.2%
of the EPA limit 2000 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2017
Highest in the city: 58.85 µg/L — FAITH BIBLE COLLEGE INTERNATIONAL · 35 people · 2019
2/2 SYR4
Arsenic
31.35 µg/L 314%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
2/2 SYR4
Lead
2.82 µg/L 19%
of the EPA limit 15 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
Highest in the city: 12.25 µg/L — FAITH BIBLE COLLEGE INTERNATIONAL · 35 people · 2019
2/2 SYR4
Toluene
9.1 µg/L 0.9%
of the EPA limit 1000 µg/L
Highest in the city: FAITH BIBLE COLLEGE INTERNATIONAL · 35 people · 2019
1/2 SYR4
cis-1,2-Dichloroethylene
3.5 µg/L 5%
of the EPA limit 70 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
1/2 SYR4
Trichloroethylene
3.4 µg/L 68%
of the EPA limit 5 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
1/2 SYR4
Gross Alpha, Excl. Radon And U
3.08 pCi/L 21%
of the EPA limit 15 pCi/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
1/2 SYR4
Chromium
2.98 µg/L 3%
of the EPA limit 100 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2017
2/2 SYR4
TTHM
2.54 µg/L 3.2%
of the EPA limit 80 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
2/2 SYR4
Combined Uranium
2.08 µg/L 6.9%
of the EPA limit 30 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
2/2 SYR4
Combined Radium (-226 And -228)
0.8058 pCi/L 16%
of the EPA limit 5 pCi/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
Highest in the city: 1.446 pCi/L — FAITH BIBLE COLLEGE INTERNATIONAL · 35 people · 2019
2/2 SYR4
Chloroform
1.37 µg/L
No EPA limit set
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
Highest in the city: 1.39 µg/L — FAITH BIBLE COLLEGE INTERNATIONAL · 35 people · 2019
2/2 SYR4
Bromodichloromethane
1.3 µg/L
No EPA limit set
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2019
1/2 SYR4
Antimony, Total
0.8600 µg/L 14%
of the EPA limit 6 µg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2017
2/2 SYR4
Lead
0.00050 mg/L 3.3%
of the EPA limit 0.0150 mg/L
Main supplier: MOUNTAIN VIEW CORRECTIONAL FACILITY · 468 people · 2025
Highest in the city: 0.0038 mg/L — FAITH BIBLE COLLEGE INTERNATIONAL · 35 people · 2025
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 Charleston

SupplierPopulation served
MOUNTAIN VIEW CORRECTIONAL FACILITY 468
FAITH BIBLE COLLEGE INTERNATIONAL 35

Frequently asked questions about Charleston tap water

Is Charleston tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Charleston. 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 Charleston?

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

What contaminants are in Charleston's water?

The contaminants EPA monitoring detected in Charleston include Nitrate, Nitrate-Nitrite, Copper, Fluoride, Barium. 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.