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Tap water quality report

Monroe, MA

EPA monitoring detected 10 contaminants across the 1 water supplier serving Monroe. 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
55
people served
10
contaminants found
Massachusetts rankings Lead in Massachusetts PFAS in Massachusetts

What was found in Monroe'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
440 µg/L 4.4%
of the EPA limit 10000 µg/L
Main supplier: MONROE WATER DISTRICT · 55 people · 2019
1/1 SYR4
TTHM
112 µg/L 140%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: MONROE WATER DISTRICT · 55 people · 2019
1/1 SYR4
Chloroform
98 µg/L
No EPA limit set
Main supplier: MONROE WATER DISTRICT · 55 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
90.82 µg/L 151%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: MONROE WATER DISTRICT · 55 people · 2019
1/1 SYR4
Trichloroacetic Acid
62 µg/L
No EPA limit set
Main supplier: MONROE WATER DISTRICT · 55 people · 2019
1/1 SYR4
Dichloroacetic Acid
28.5 µg/L
No EPA limit set
Main supplier: MONROE WATER DISTRICT · 55 people · 2019
1/1 SYR4
Bromodichloromethane
3.86 µg/L
No EPA limit set
Main supplier: MONROE WATER DISTRICT · 55 people · 2019
1/1 SYR4
Monochloroacetic Acid
1.955 µg/L
No EPA limit set
Main supplier: MONROE WATER DISTRICT · 55 people · 2019
1/1 SYR4
Monobromoacetic Acid
0.7005 µg/L
No EPA limit set
Main supplier: MONROE WATER DISTRICT · 55 people · 2019
1/1 SYR4
Lead
0.0069 mg/L 46%
of the EPA limit 0.0150 mg/L
Main supplier: MONROE WATER DISTRICT · 55 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 Monroe

SupplierPopulation served
MONROE WATER DISTRICT 55

Frequently asked questions about Monroe tap water

Is Monroe tap water safe to drink?

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

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

What contaminants are in Monroe's water?

The contaminants EPA monitoring detected in Monroe include Nitrate, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic 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.