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Tap water quality report

Brockton, MA

EPA monitoring detected 17 contaminants across the 1 water supplier serving Brockton. 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
105,788
people served
17
contaminants found
Massachusetts rankings Lead in Massachusetts PFAS in Massachusetts

What was found in Brockton'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
410.25 µg/L 4.1%
of the EPA limit 10000 µg/L
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
TTHM
104.66 µg/L 131%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Chloroform
60.82 µg/L
No EPA limit set
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Barium
47.6 µg/L 2.4%
of the EPA limit 2000 µg/L
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Bromoform
40.5 µg/L
No EPA limit set
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
37.49 µg/L 62%
of the EPA limit 60 µg/L
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Bromodichloromethane
25.18 µg/L
No EPA limit set
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Trichloroacetic Acid
24.605 µg/L
No EPA limit set
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Dichloroacetic Acid
13.95 µg/L
No EPA limit set
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Dibromochloromethane
9.48 µg/L
No EPA limit set
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Arsenic
6 µg/L 60%
of the EPA limit 10 µg/L
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Monochloroacetic Acid
4.404 µg/L
No EPA limit set
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Monobromoacetic Acid
2.225 µg/L
No EPA limit set
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.4 µg/L
No EPA limit set
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Dalapon
1.2 µg/L 0.6%
of the EPA limit 200 µg/L
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2018
1/1 SYR4
Thallium, Total
1 µg/L 50%
of the EPA limit 2 µg/L
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2019
1/1 SYR4
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
Main supplier: BROCKTON WATER DEPARTMENT · 105,788 people · 2023
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 Brockton

SupplierPopulation served
BROCKTON WATER DEPARTMENT 105,788

Frequently asked questions about Brockton tap water

Is Brockton tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Brockton. 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 Brockton?

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

What contaminants are in Brockton's water?

The contaminants EPA monitoring detected in Brockton include Nitrate, TTHM, Chloroform, Barium, Bromoform. 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.