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Tap water quality report

Worcester, MA

EPA monitoring detected 19 contaminants across the 1 water supplier serving Worcester. 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
206,518
people served
19
contaminants found
Massachusetts rankings Lead in Massachusetts PFAS in Massachusetts

What was found in Worcester'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
284 µg/L 2.8%
of the EPA limit 10000 µg/L
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
TTHM
77.45 µg/L 97%
of the EPA limit 80 µg/L
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Chloroform
72.27 µg/L
No EPA limit set
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Fluoride
68.8 µg/L 1.7%
of the EPA limit 4000 µg/L
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
51.36 µg/L 86%
of the EPA limit 60 µg/L
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Trichloroacetic Acid
24.54 µg/L
No EPA limit set
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Dichloroacetic Acid
18.565 µg/L
No EPA limit set
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Bromodichloromethane
15.18 µg/L
No EPA limit set
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Barium
13.65 µg/L 0.7%
of the EPA limit 2000 µg/L
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Dibromochloromethane
4.04 µg/L
No EPA limit set
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Monochloroacetic Acid
4 µg/L
No EPA limit set
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Dichloromethane
2.2 µg/L 44%
of the EPA limit 5 µg/L
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Monobromoacetic Acid
1.92 µg/L
No EPA limit set
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2018
1/1 SYR4
Chlorobenzene
1.9 µg/L 1.9%
of the EPA limit 100 µg/L
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Dibromoacetic Acid
0.7940 µg/L
No EPA limit set
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2018
1/1 SYR4
P-Dichlorobenzene
0.7000 µg/L 0.9%
of the EPA limit 75 µg/L
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
O-Dichlorobenzene
0.6000 µg/L 0.1%
of the EPA limit 600 µg/L
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2019
1/1 SYR4
Pfpea
0.0032 µg/L
No EPA limit set
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2024
1/1 UCMR-5
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
Main supplier: WORCESTER DPWP, WATER SUPPLY DIVISION · 206,518 people · 2024
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 Worcester

SupplierPopulation served
WORCESTER DPWP, WATER SUPPLY DIVISION 206,518

Frequently asked questions about Worcester tap water

Is Worcester tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Worcester. 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 Worcester?

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

What contaminants are in Worcester's water?

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