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Tap water quality report

Columbia, ME

EPA monitoring detected 10 contaminants across the 1 water supplier serving Columbia. 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.

1
water supplier
50
people served
10
contaminants found
Maine rankings Lead in Maine PFAS in Maine

What was found in Columbia'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
830 µg/L 8.3%
of the EPA limit 10000 µg/L
Main supplier: ALLEN WATER COMPANY · 50 people · 2019
1/1 SYR4
Nitrate-Nitrite
569.5 µg/L 5.7%
of the EPA limit 10000 µg/L
Main supplier: ALLEN WATER COMPANY · 50 people · 2019
1/1 SYR4
Copper
475.2 µg/L 37%
of the EPA limit 1300 µg/L
Main supplier: ALLEN WATER COMPANY · 50 people · 2019
1/1 SYR4
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
Main supplier: ALLEN WATER COMPANY · 50 people · 2019
1/1 SYR4
Lead
14.86 µg/L 99%
of the EPA limit 15 µg/L
Main supplier: ALLEN WATER COMPANY · 50 people · 2019
1/1 SYR4
Chloroform
3 µg/L
No EPA limit set
Main supplier: ALLEN WATER COMPANY · 50 people · 2019
1/1 SYR4
Arsenic
1.8 µg/L 18%
of the EPA limit 10 µg/L
Main supplier: ALLEN WATER COMPANY · 50 people · 2019
1/1 SYR4
Chromium
0.8880 µg/L 0.9%
of the EPA limit 100 µg/L
Main supplier: ALLEN WATER COMPANY · 50 people · 2019
1/1 SYR4
Barium
0.5200 µg/L 0%
of the EPA limit 2000 µg/L
Main supplier: ALLEN WATER COMPANY · 50 people · 2019
1/1 SYR4
Lead
0.0031 mg/L 21%
of the EPA limit 0.0150 mg/L
Main supplier: ALLEN WATER COMPANY · 50 people · 2025
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 Columbia

SupplierPopulation served
ALLEN WATER COMPANY 50

Frequently asked questions about Columbia tap water

Is Columbia tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Columbia. 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 Columbia?

1 public water supplier report drinking-water monitoring for Columbia, Maine to the EPA. Each is listed above with its population served.

What contaminants are in Columbia's water?

The contaminants EPA monitoring detected in Columbia include Nitrate, Nitrate-Nitrite, Copper, Fluoride, Lead. 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.