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Tap water quality report

Guilford, ME

EPA monitoring detected 15 contaminants across the 2 water suppliers serving Guilford. 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
1,560
people served
15
contaminants found
Maine rankings Lead in Maine PFAS in Maine

What was found in Guilford'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
Fluoride
961 µg/L 24%
of the EPA limit 4000 µg/L
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2019
2/2 SYR4
Nitrate
640 µg/L 6.4%
of the EPA limit 10000 µg/L
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2019
1/2 SYR4
Nitrate-Nitrite
621.5 µg/L 6.2%
of the EPA limit 10000 µg/L
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2014
1/2 SYR4
Lead
44.45 µg/L 296%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2019
Highest in the city: 578.5 µg/L — COVERED BRIDGE APARTMENTS · 25 people · 2019
2/2 SYR4
Copper
394.7 µg/L 30%
of the EPA limit 1300 µg/L
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2019
2/2 SYR4
Barium
13.4 µg/L 0.7%
of the EPA limit 2000 µg/L
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2017
Highest in the city: 62.6 µg/L — COVERED BRIDGE APARTMENTS · 25 people · 2019
2/2 SYR4
Arsenic
23.35 µg/L 234%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
Highest in the city: COVERED BRIDGE APARTMENTS · 25 people · 2019
1/2 SYR4
TTHM
7.84 µg/L 9.8%
of the EPA limit 80 µg/L
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2019
2/2 SYR4
Chloroform
1.4 µg/L
No EPA limit set
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2019
Highest in the city: 4 µg/L — COVERED BRIDGE APARTMENTS · 25 people · 2016
2/2 SYR4
Dibromochloromethane
3.36 µg/L
No EPA limit set
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2019
1/2 SYR4
Bromoform
2.555 µg/L
No EPA limit set
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2019
1/2 SYR4
Bromodichloromethane
2 µg/L
No EPA limit set
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2019
1/2 SYR4
Chromium
1.64 µg/L 1.6%
of the EPA limit 100 µg/L
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 people · 2017
Highest in the city: 1.895 µg/L — COVERED BRIDGE APARTMENTS · 25 people · 2019
2/2 SYR4
Combined Radium (-226 And -228)
1 pCi/L 20%
of the EPA limit 5 pCi/L
Highest in the city: COVERED BRIDGE APARTMENTS · 25 people · 2018
1/2 SYR4
Lead
0.0025 mg/L 17%
of the EPA limit 0.0150 mg/L
Main supplier: GUILFORD-SANGERVILLE UTILITIES DISTRICT · 1,535 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 Guilford

SupplierPopulation served
GUILFORD-SANGERVILLE UTILITIES DISTRICT 1,535
COVERED BRIDGE APARTMENTS 25

Frequently asked questions about Guilford tap water

Is Guilford tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Guilford. 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 Guilford?

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

What contaminants are in Guilford's water?

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