Is Oxford, CT Tap Water Safe? Quality & Contaminants

What was found in Oxford's water

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

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	2085 µg/L 21% of the EPA limit 10000 µg/L	1/4	SYR4
Nitrate-Nitrite	2085 µg/L 21% of the EPA limit 10000 µg/L	1/4	SYR4
Copper	1950 µg/L 150% of the EPA limit, in the worst sample — 1300 µg/L	4/4	SYR4
TTHM	104 µg/L 130% of the EPA limit, in the worst sample — 80 µg/L	4/4	SYR4
Chloroform	91 µg/L No EPA limit set	4/4	SYR4
Total Haloacetic Acids (HAA5)	61 µg/L 102% of the EPA limit, in the worst sample — 60 µg/L	4/4	SYR4
Barium	52 µg/L 2.6% of the EPA limit 2000 µg/L	1/4	SYR4
Fluoride	50 µg/L 1.3% of the EPA limit 4000 µg/L	1/4	SYR4
Lead	42 µg/L 280% of the EPA limit, in the worst sample — 15 µg/L	4/4	SYR4
Trichloroacetic Acid	34 µg/L No EPA limit set	4/4	SYR4
Dichloroacetic Acid	26 µg/L No EPA limit set	2/4	SYR4
Bromodichloromethane	16 µg/L No EPA limit set	4/4	SYR4
Dibromochloromethane	8 µg/L No EPA limit set	4/4	SYR4
Combined Radium (-226 And -228)	5.9 pCi/L 118% of the EPA limit, in the worst sample — 5 pCi/L	1/4	SYR4
Bromoform	3 µg/L No EPA limit set	4/4	SYR4
Monochloroacetic Acid	2 µg/L No EPA limit set	1/4	SYR4
Dibromoacetic Acid	1 µg/L No EPA limit set	2/4	SYR4
PFOA	0.0081 µg/L No EPA limit set	2/4	UCMR-5
PFOS	0.0069 µg/L No EPA limit set	1/4	UCMR-5
Pfpea	0.0068 µg/L No EPA limit set	1/4	UCMR-5
Pfhxa	0.0049 µg/L No EPA limit set	1/4	UCMR-5
PFBS	0.0046 µg/L No EPA limit set	2/4	UCMR-5
Pfhpa	0.0036 µg/L No EPA limit set	1/4	UCMR-5
Lead	0.0011 mg/L 7.3% 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 Oxford

Supplier	Population served
AQUARION-VALLEY	13,080
HERITAGE WATER COMPANY	7,300
AQUARION-OXFORD TOWNE CENTER	449
AQUARION-HAWKSTONE	120

Frequently asked questions about Oxford tap water

Is Oxford tap water safe to drink?

EPA testing detected 24 contaminants in the water serving Oxford. 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 Oxford?

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

What contaminants are in Oxford's water?

The contaminants EPA monitoring detected in Oxford include Nitrate, Nitrate-Nitrite, Copper, TTHM, Chloroform. 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.