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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 highest level found 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 highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
540 µg/L 5.4%
of the EPA limit 10000 µg/L
 1/1 SYR4
TTHM
122.9 µg/L 154%
of the EPA limit, in the worst sample — 80 µg/L
 1/1 SYR4
Chloroform
95.7 µg/L
No EPA limit set
 1/1 SYR4
Total Haloacetic Acids (HAA5)
78 µg/L 130%
of the EPA limit, in the worst sample — 60 µg/L
 1/1 SYR4
Bromoform
75.4 µg/L
No EPA limit set
 1/1 SYR4
Barium
53 µg/L 2.7%
of the EPA limit 2000 µg/L
 1/1 SYR4
Trichloroacetic Acid
50 µg/L
No EPA limit set
 1/1 SYR4
Bromodichloromethane
47 µg/L
No EPA limit set
 1/1 SYR4
Dibromochloromethane
42 µg/L
No EPA limit set
 1/1 SYR4
Dichloroacetic Acid
25 µg/L
No EPA limit set
 1/1 SYR4
Monobromoacetic Acid
12 µg/L
No EPA limit set
 1/1 SYR4
Arsenic
6 µg/L 60%
of the EPA limit 10 µg/L
 1/1 SYR4
Monochloroacetic Acid
5.7 µg/L
No EPA limit set
 1/1 SYR4
Dibromoacetic Acid
2.2 µg/L
No EPA limit set
 1/1 SYR4
Dalapon
1.2 µg/L 0.6%
of the EPA limit 200 µg/L
 1/1 SYR4
Thallium, Total
1 µg/L 50%
of the EPA limit 2 µg/L
 1/1 SYR4
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — 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, Total Haloacetic Acids (HAA5), Bromoform. The full list, with the highest level found 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.