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Tap water quality report

Avon Water Co

EPA monitoring tested this supplier for 111 contaminants and detected 27. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

111
contaminants tested
27
detected
11,590
people served
4
health-based violations
Connecticut rankingsLead in ConnecticutPFAS in Connecticut
Water source
Ground water
Ownership
Private
Counties served
Hartford

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

4
health-based violations
473
violations on file
1
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2004-01-01 → 2004-01-31
MCL Health-based Resolved 2004-01-01 → 2004-01-31
MCL Health-based Resolved 2004-01-01 → 2004-01-31
MCL Health-based Resolved 2004-01-01 → 2004-01-31
MR Monitoring Resolved 2018-01-01 → 2018-03-31
MR Monitoring Resolved 2018-01-01 → 2018-03-31
MR Monitoring Resolved 2018-01-01 → 2018-03-31
MR Monitoring Resolved 2018-01-01 → 2018-03-31
MR Monitoring Resolved 2018-01-01 → 2018-03-31
MR Monitoring Resolved 2018-01-01 → 2018-03-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOA 0.0070 µg/L 5/12 2025
PFBS 0.0030 µg/L 4/12 2025
PFOS 0.0080 µg/L 4/12 2025
Pfhxa 0.0040 µg/L 2/12 2025

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Dibromochloromethane
5.2 µg/L
No EPA limit set
worst single sample: 7.9 µg/L
155/344 SYR4 2012–2019
Bromodichloromethane
3.085 µg/L
No EPA limit set
worst single sample: 5.1 µg/L
144/344 SYR4 2012–2019
Bromoform
2.98 µg/L
No EPA limit set
worst single sample: 4 µg/L
137/344 SYR4 2012–2019
Copper
625.2 µg/L 48%
of the EPA limit 1300 µg/L
worst single sample: 994 µg/L
133/133 SYR4 2014–2019
TTHM
12.62 µg/L 16%
of the EPA limit 80 µg/L
worst single sample: 18.2 µg/L
129/132 SYR4 2012–2019
Nitrate
3800 µg/L 38%
of the EPA limit 10000 µg/L
worst single sample: 4200 µg/L
126/126 SYR4 2012–2019
Dibromoacetic Acid
2.43 µg/L
No EPA limit set
worst single sample: 3.2 µg/L
118/132 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
3.315 µg/L 5.5%
of the EPA limit 60 µg/L
worst single sample: 5.4 µg/L
118/132 SYR4 2012–2019
Chloroform
1.535 µg/L
No EPA limit set
worst single sample: 2.4 µg/L
114/344 SYR4 2012–2019
Nitrate-Nitrite
3780 µg/L 38%
of the EPA limit 10000 µg/L
worst single sample: 4200 µg/L
63/63 SYR4 2012–2019
Dichloroacetic Acid
1.1 µg/L
No EPA limit set
worst single sample: 1.8 µg/L
28/132 SYR4 2012–2019
Lead
18.6 µg/L 124%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 49 µg/L
25/133 SYR4 2014–2019
Barium
1050.72 µg/L 53%
of the EPA limit 2000 µg/L
worst single sample: 1258.7 µg/L
24/24 SYR4 2014–2018
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2026
Chromium
1.92 µg/L 1.9%
of the EPA limit 100 µg/L
worst single sample: 2.4 µg/L
13/24 SYR4 2014–2018
Combined Radium (-226 And -228)
1.517 pCi/L 30%
of the EPA limit 5 pCi/L
worst single sample: 1.58 pCi/L
10/24 SYR4 2013–2018
Monochloroacetic Acid
1.1 µg/L
No EPA limit set
 9/132 SYR4 2012–2019
Trichloroacetic Acid
0.6130 µg/L
No EPA limit set
worst single sample: 0.6200 µg/L
8/132 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
1.7595 pCi/L 12%
of the EPA limit 15 pCi/L
worst single sample: 1.8 pCi/L
4/24 SYR4 2013–2018
Chlordane
0.2940 µg/L 15%
of the EPA limit 2 µg/L
worst single sample: 0.3000 µg/L
3/72 SYR4 2012–2019
Combined Uranium
2.18 µg/L 7.3%
of the EPA limit 30 µg/L
worst single sample: 2.2 µg/L
3/24 SYR4 2013–2018
Monobromoacetic Acid
0.7260 µg/L
No EPA limit set
worst single sample: 0.7300 µg/L
3/132 SYR4 2012–2019
Arsenic
3.2 µg/L 32%
of the EPA limit 10 µg/L
 1/24 SYR4 2014–2018
84 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MCDERMOTT, GERALD
Phone
860-664-6125
Email
[email protected]

Frequently asked questions about Avon Water Co

Is Avon Water Co tap water safe to drink?

EPA monitoring detected 27 contaminants in Avon Water Co's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Avon Water Co's water?

EPA monitoring detected Dibromochloromethane, Bromodichloromethane, Bromoform, Copper, TTHM, and others. The full list with the level and data source for each is above.

How many people does Avon Water Co serve?

Avon Water Co reports serving 11,590 people in Connecticut, per its EPA record.

Has Avon Water Co had any water quality violations?

The EPA has 473 violations on file for Avon Water Co, of which 4 are health-based (a contaminant limit or required treatment was breached) and 1 remain open. The rest are monitoring or reporting failures.

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.