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Tap water quality report

ZIP 01432 — Ayer, MA

EPA monitoring across the 2 water suppliers serving ZIP 01432 in Ayer, MA detected 20 contaminants. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier below, with the EPA limit for each.

2
water suppliers
14,979
people served
20
contaminants found

What was found in ZIP 01432

The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
910 µg/L 9.1%
of the EPA limit 10000 µg/L
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2019
2/2 SYR4
Copper
510.5 µg/L 39%
of the EPA limit 1300 µg/L
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2019
Highest in the ZIP: 511 µg/L — DEVENS MASSDEVELOPMENT · 6,500 people · 2019
2/2 SYR4
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2018
Highest in the ZIP: 120 µg/L — DEVENS MASSDEVELOPMENT · 6,500 people · 2019
2/2 SYR4
Arsenic
81.4 µg/L 814%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2019
2/2 SYR4
Barium
44.15 µg/L 2.2%
of the EPA limit 2000 µg/L
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2018
2/2 SYR4
TTHM
27.3 µg/L 34%
of the EPA limit 80 µg/L
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2019
2/2 SYR4
Lead
20.6 µg/L 137%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2016
2/2 SYR4
Chloroform
16.24 µg/L
No EPA limit set
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2019
2/2 SYR4
Dibromochloromethane
3.5975 µg/L
No EPA limit set
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2019
Highest in the ZIP: 8.85 µg/L — DEVENS MASSDEVELOPMENT · 6,500 people · 2019
2/2 SYR4
Bromodichloromethane
8.546 µg/L
No EPA limit set
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
8.384 µg/L 14%
of the EPA limit 60 µg/L
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2019
2/2 SYR4
Trichloroacetic Acid
6.683 µg/L
No EPA limit set
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2019
1/2 SYR4
Bromoform
4.64 µg/L
No EPA limit set
Highest in the ZIP: DEVENS MASSDEVELOPMENT · 6,500 people · 2019
1/2 SYR4
Dibromoacetic Acid
2.26 µg/L
No EPA limit set
Highest in the ZIP: DEVENS MASSDEVELOPMENT · 6,500 people · 2019
1/2 SYR4
Dichloroacetic Acid
1.715 µg/L
No EPA limit set
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2019
Highest in the ZIP: 1.765 µg/L — DEVENS MASSDEVELOPMENT · 6,500 people · 2019
2/2 SYR4
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2018
1/2 SYR4
Pfba
0.0199 µg/L
No EPA limit set
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2024
2/2 UCMR-5
Pfpea
0.0131 µg/L
No EPA limit set
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2024
2/2 UCMR-5
Pfhxa
0.0052 µg/L
No EPA limit set
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2024
1/2 UCMR-5
Lead
0.0028 mg/L 19%
of the EPA limit 0.0150 mg/L
Main supplier: AYER DPW WATER DIVISION · 8,479 people · 2025
2/2 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.

Water suppliers serving ZIP 01432

SupplierStatePopulation served
AYER DPW WATER DIVISION MA 8,479
DEVENS MASSDEVELOPMENT MA 6,500

Frequently asked questions about ZIP 01432 tap water

Is the tap water in ZIP 01432 safe to drink?

EPA testing detected 20 contaminants across the water suppliers serving ZIP 01432. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.

Which water suppliers serve ZIP 01432?

2 public water suppliers report EPA drinking-water monitoring for ZIP 01432. Each is listed above with its population served.

What contaminants are in ZIP 01432's water?

EPA monitoring detected Nitrate, Copper, Fluoride, Arsenic, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.