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Tap water quality report

Andover, MA

EPA monitoring detected 10 contaminants across the 1 water supplier serving Andover. 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
36,569
people served
10
contaminants found
Massachusetts rankings Lead in Massachusetts PFAS in Massachusetts

What was found in Andover'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
Fluoride
865 µg/L 22%
of the EPA limit 4000 µg/L
Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
1/1 SYR4
Nitrate
290 µg/L 2.9%
of the EPA limit 10000 µg/L
Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
1/1 SYR4
TTHM
51.62 µg/L 65%
of the EPA limit 80 µg/L
Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
1/1 SYR4
Barium
16.7 µg/L 0.8%
of the EPA limit 2000 µg/L
Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
9.1715 µg/L 15%
of the EPA limit 60 µg/L
Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
1/1 SYR4
Bromate
2.38 µg/L 24%
of the EPA limit 10 µg/L
Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
1/1 SYR4
Copper
1.885 µg/L 0.1%
of the EPA limit 1300 µg/L
Main supplier: ANDOVER WATER DEPT · 36,569 people · 2017
1/1 SYR4
1,2-Dichloroethane
0.7000 µg/L 14%
of the EPA limit 5 µg/L
Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
1/1 SYR4
Pfpea
0.0040 µg/L
No EPA limit set
Main supplier: ANDOVER WATER DEPT · 36,569 people · 2025
1/1 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: ANDOVER WATER DEPT · 36,569 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 Andover

SupplierPopulation served
ANDOVER WATER DEPT 36,569

Frequently asked questions about Andover tap water

Is Andover tap water safe to drink?

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

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

What contaminants are in Andover's water?

The contaminants EPA monitoring detected in Andover include Fluoride, Nitrate, TTHM, Barium, 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.