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Tap water quality report

Southbury, CT

EPA monitoring detected 22 contaminants across the 4 water suppliers serving Southbury. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

4
water suppliers
8,611
people served
22
contaminants found
Connecticut rankings Lead in Connecticut PFAS in Connecticut

What was found in Southbury's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
3400 µg/L 34%
of the EPA limit 10000 µg/L
 3/4 SYR4
Nitrate-Nitrite
3400 µg/L 34%
of the EPA limit 10000 µg/L
 3/4 SYR4
Copper
1500 µg/L 115%
of the EPA limit, in the worst sample — 1300 µg/L
 4/4 SYR4
Fluoride
94 µg/L 2.4%
of the EPA limit 4000 µg/L
 2/4 SYR4
Chromium
40 µg/L 40%
of the EPA limit 100 µg/L
 1/4 SYR4
TTHM
37.3 µg/L 47%
of the EPA limit 80 µg/L
 3/4 SYR4
Barium
30 µg/L 1.5%
of the EPA limit 2000 µg/L
 3/4 SYR4
Chloroform
19.1 µg/L
No EPA limit set
 3/4 SYR4
Combined Uranium
19 µg/L 63%
of the EPA limit 30 µg/L
 1/4 SYR4
Bromodichloromethane
16 µg/L
No EPA limit set
 3/4 SYR4
Bromoform
14.2 µg/L
No EPA limit set
 3/4 SYR4
Dibromochloromethane
9.02 µg/L
No EPA limit set
 4/4 SYR4
Lead
9 µg/L 60%
of the EPA limit 15 µg/L
 4/4 SYR4
Total Haloacetic Acids (HAA5)
7.4 µg/L 12%
of the EPA limit 60 µg/L
 3/4 SYR4
Gross Alpha, Excl. Radon And U
6.68 pCi/L 45%
of the EPA limit 15 pCi/L
 1/4 SYR4
Trichloroacetic Acid
5.1 µg/L
No EPA limit set
 3/4 SYR4
Combined Radium (-226 And -228)
3.03 pCi/L 61%
of the EPA limit 5 pCi/L
 2/4 SYR4
Dichloroacetic Acid
3 µg/L
No EPA limit set
 2/4 SYR4
Dibromoacetic Acid
1 µg/L
No EPA limit set
 2/4 SYR4
PFOA
0.0041 µg/L
No EPA limit set
 1/4 UCMR-5
PFBS
0.0032 µg/L
No EPA limit set
 1/4 UCMR-5
Lead
0.0018 mg/L 12%
of the EPA limit 0.0150 mg/L
 4/4 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 single worst sample on record — 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 Southbury

SupplierPopulation served
HERITAGE WATER COMPANY 7,300
SOUTHBURY TRAINING SCHOOL 816
AQUARION-LAKESIDE 455
OAKDALE MANOR WATER ASSOCIATION 40

Frequently asked questions about Southbury tap water

Is Southbury tap water safe to drink?

EPA testing detected 22 contaminants in the water serving Southbury. 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 Southbury?

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

What contaminants are in Southbury's water?

The contaminants EPA monitoring detected in Southbury include Nitrate, Nitrate-Nitrite, Copper, Fluoride, Chromium. The full list, with the highest level found 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.