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Tap water quality report

Houlton, ME

EPA monitoring detected 16 contaminants across the 2 water suppliers serving Houlton. 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
4,773
people served
16
contaminants found
Maine rankings Lead in Maine PFAS in Maine

What was found in Houlton'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
4215 µg/L 42%
of the EPA limit 10000 µg/L
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2019
2/2 SYR4
Nitrate-Nitrite
2891.5 µg/L 29%
of the EPA limit 10000 µg/L
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2017
2/2 SYR4
Fluoride
1000 µg/L 25%
of the EPA limit 4000 µg/L
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2019
1/2 SYR4
Copper
140 µg/L 11%
of the EPA limit 1300 µg/L
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2017
2/2 SYR4
Lead
3.635 µg/L 24%
of the EPA limit 15 µg/L
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2017
Highest in the city: 13.86 µg/L — CREST VIEW MANOR · 38 people · 2018
2/2 SYR4
Barium
9.07 µg/L 0.5%
of the EPA limit 2000 µg/L
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2017
2/2 SYR4
TTHM
6.09 µg/L 7.6%
of the EPA limit 80 µg/L
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2019
1/2 SYR4
Chromium
2.91 µg/L 2.9%
of the EPA limit 100 µg/L
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2017
Highest in the city: 4.62 µg/L — CREST VIEW MANOR · 38 people · 2018
2/2 SYR4
Chloroform
3.49 µg/L
No EPA limit set
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2019
1/2 SYR4
Bromodichloromethane
2.495 µg/L
No EPA limit set
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2019
1/2 SYR4
Dibromochloromethane
1.1 µg/L
No EPA limit set
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2019
1/2 SYR4
Dichloroacetic Acid
1 µg/L
No EPA limit set
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
1 µg/L 1.7%
of the EPA limit 60 µg/L
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2019
1/2 SYR4
Antimony, Total
0.5900 µg/L 9.8%
of the EPA limit 6 µg/L
Highest in the city: CREST VIEW MANOR · 38 people · 2018
1/2 SYR4
PFOS
0.0048 µg/L
No EPA limit set
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2025
1/2 UCMR-5
Lead
0.0034 mg/L 23%
of the EPA limit 0.0150 mg/L
Main supplier: HOULTON WATER COMPANY · 4,735 people · 2023
Highest in the city: 0.0037 mg/L — CREST VIEW MANOR · 38 people · 2023
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 Houlton

SupplierPopulation served
HOULTON WATER COMPANY 4,735
CREST VIEW MANOR 38

Frequently asked questions about Houlton tap water

Is Houlton tap water safe to drink?

EPA testing detected 16 contaminants in the water serving Houlton. 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 Houlton?

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

What contaminants are in Houlton's water?

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