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Tap water quality report

Killingworth, CT

EPA monitoring detected 9 contaminants across the 2 water suppliers serving Killingworth. 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
837
people served
9
contaminants found
Connecticut rankings Lead in Connecticut PFAS in Connecticut

What was found in Killingworth'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
1920 µg/L 19%
of the EPA limit 10000 µg/L
Main supplier: CTWC - JENSENS BEECHWOOD SYSTEM · 750 people · 2019
1/2 SYR4
Nitrate-Nitrite
1911 µg/L 19%
of the EPA limit 10000 µg/L
Main supplier: CTWC - JENSENS BEECHWOOD SYSTEM · 750 people · 2019
1/2 SYR4
Copper
174.5 µg/L 13%
of the EPA limit 1300 µg/L
Main supplier: CTWC - JENSENS BEECHWOOD SYSTEM · 750 people · 2019
1/2 SYR4
Toluene
91 µg/L 9.1%
of the EPA limit 1000 µg/L
Main supplier: CTWC - JENSENS BEECHWOOD SYSTEM · 750 people · 2019
1/2 SYR4
Gross Alpha, Excl. Radon And U
21.3 pCi/L 142%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Main supplier: CTWC - JENSENS BEECHWOOD SYSTEM · 750 people · 2019
1/2 SYR4
Barium
13.9 µg/L 0.7%
of the EPA limit 2000 µg/L
Main supplier: CTWC - JENSENS BEECHWOOD SYSTEM · 750 people · 2019
1/2 SYR4
Lead
4.2 µg/L 28%
of the EPA limit 15 µg/L
Main supplier: CTWC - JENSENS BEECHWOOD SYSTEM · 750 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
1.714 pCi/L 34%
of the EPA limit 5 pCi/L
Main supplier: CTWC - JENSENS BEECHWOOD SYSTEM · 750 people · 2019
1/2 SYR4
Lead
0.0027 mg/L 18%
of the EPA limit 0.0150 mg/L
Main supplier: CTWC - JENSENS BEECHWOOD SYSTEM · 750 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. 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 Killingworth

SupplierPopulation served
CTWC - JENSENS BEECHWOOD SYSTEM 750
M&M REALTY HOLDINGS LLC 87

Frequently asked questions about Killingworth tap water

Is Killingworth tap water safe to drink?

EPA testing detected 9 contaminants in the water serving Killingworth. 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 Killingworth?

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

What contaminants are in Killingworth's water?

The contaminants EPA monitoring detected in Killingworth include Nitrate, Nitrate-Nitrite, Copper, Toluene, Gross Alpha, Excl. Radon And U. 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.