Tap WaterIndex

← Connecticut

Tap water quality report

New London, CT

EPA monitoring detected 12 contaminants across the 2 water suppliers serving New London. 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.

2
water suppliers
44,198
people served
12
contaminants found
Connecticut rankings Lead in Connecticut PFAS in Connecticut

What was found in New London'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
926 µg/L 23%
of the EPA limit 4000 µg/L
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2019
1/2 SYR4
Copper
161 µg/L 12%
of the EPA limit 1300 µg/L
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2019
2/2 SYR4
Nitrate
88 µg/L 0.9%
of the EPA limit 10000 µg/L
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2019
1/2 SYR4
TTHM
76.275 µg/L 95%
of the EPA limit 80 µg/L
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2019
Highest in the city: 80.19 µg/L — WATERFORD WPCA · 16,578 people · 2019
2/2 SYR4
Lead
7.8 µg/L 52%
of the EPA limit 15 µg/L
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2019
Highest in the city: 78.29 µg/L — WATERFORD WPCA · 16,578 people · 2017
2/2 SYR4
Nitrate-Nitrite
70.75 µg/L 0.7%
of the EPA limit 10000 µg/L
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
34.6 µg/L 58%
of the EPA limit 60 µg/L
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2019
2/2 SYR4
Chloroform
14.86 µg/L
No EPA limit set
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2019
1/2 SYR4
Barium
6 µg/L 0.3%
of the EPA limit 2000 µg/L
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2019
1/2 SYR4
Bromodichloromethane
3.59 µg/L
No EPA limit set
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2019
1/2 SYR4
Dibromochloromethane
0.6000 µg/L
No EPA limit set
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2019
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: NEW LONDON DEPT. OF PUBLIC UTILITIES · 27,620 people · 2025
Highest in the city: 0.0015 mg/L — WATERFORD WPCA · 16,578 people · 2023
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. 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 New London

SupplierPopulation served
NEW LONDON DEPT. OF PUBLIC UTILITIES 27,620
WATERFORD WPCA 16,578

Frequently asked questions about New London tap water

Is New London tap water safe to drink?

EPA testing detected 12 contaminants in the water serving New London. 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 New London?

2 public water suppliers report drinking-water monitoring for New London, Connecticut to the EPA. Each is listed above with its population served.

What contaminants are in New London's water?

The contaminants EPA monitoring detected in New London include Fluoride, Copper, Nitrate, TTHM, Lead. 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.