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Tap water quality report

Medfield, MA

EPA monitoring detected 22 contaminants across the 1 water supplier serving Medfield. 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
12,713
people served
22
contaminants found
Massachusetts rankings Lead in Massachusetts PFAS in Massachusetts

What was found in Medfield'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
3122.5 µg/L 31%
of the EPA limit 10000 µg/L
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Fluoride
119.5 µg/L 3%
of the EPA limit 4000 µg/L
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2017
1/1 SYR4
Copper
98.5 µg/L 7.6%
of the EPA limit 1300 µg/L
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
TTHM
16 µg/L 20%
of the EPA limit 80 µg/L
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Monochloroacetic Acid
8.4 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Bromodichloromethane
5.395 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Tetrachloroethylene
4.93 µg/L 99%
of the EPA limit 5 µg/L
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Dibromochloromethane
4.84 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Chloroform
3.4 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
2.695 µg/L 4.5%
of the EPA limit 60 µg/L
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Bromoform
2.16 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.68 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Trichloroacetic Acid
1.575 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Dichloroacetic Acid
1.385 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Dichloromethane
0.5000 µg/L 10%
of the EPA limit 5 µg/L
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Trichloroethylene
0.5000 µg/L 10%
of the EPA limit 5 µg/L
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2019
1/1 SYR4
Lead
0.0070 mg/L 47%
of the EPA limit 0.0150 mg/L
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2025
1/1 LCR
PFOA
0.0070 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2024
1/1 UCMR-5
PFOS
0.0067 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2024
1/1 UCMR-5
Pfpea
0.0065 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2024
1/1 UCMR-5
Pfhxa
0.0050 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2024
1/1 UCMR-5
PFBS
0.0046 µg/L
No EPA limit set
Main supplier: MEDFIELD WATER DEPT. · 12,713 people · 2024
1/1 UCMR-5
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 Medfield

SupplierPopulation served
MEDFIELD WATER DEPT. 12,713

Frequently asked questions about Medfield tap water

Is Medfield tap water safe to drink?

EPA testing detected 22 contaminants in the water serving Medfield. 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 Medfield?

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

What contaminants are in Medfield's water?

The contaminants EPA monitoring detected in Medfield include Nitrate, Fluoride, Copper, TTHM, Monochloroacetic Acid. 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.