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Tap water quality report

Ctwc - Crystal

EPA monitoring tested this supplier for 111 contaminants and detected 24. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

111
contaminants tested
24
detected
6,378
people served
10
health-based violations
Connecticut rankingsLead in ConnecticutPFAS in Connecticut
Water source
Ground water
Ownership
Private
Counties served
Windham

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.

10
health-based violations
300
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2004-07-01 → 2004-07-31
MCL Health-based Resolved 2004-07-01 → 2004-07-31
MCL Health-based Resolved 2004-07-01 → 2004-07-31
MCL Health-based Resolved 2004-07-01 → 2004-07-31
MCL Health-based Resolved 2002-09-01 → 2002-09-30
MCL Health-based Resolved 2002-09-01 → 2002-09-30
MCL Health-based Resolved 1995-09-01 → 1995-09-30
MCL Health-based Resolved 1995-09-01 → 1995-09-30
MCL Health-based Resolved 1995-09-01 → 1995-09-30
MCL Health-based Resolved 1995-09-01 → 1995-09-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOA 0.0099 µg/L 4/4 2025
PFOS 0.0068 µg/L 3/4 2025
PFBS 0.0033 µg/L 2/4 2025
PFHXS 0.0040 µg/L 2/4 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
Copper
702 µg/L 54%
of the EPA limit 1300 µg/L
worst single sample: 1800 µg/L
331/331 SYR4 2014–2019
Lead
5.22 µg/L 35%
of the EPA limit 15 µg/L
worst single sample: 149 µg/L
173/331 SYR4 2014–2019
Nitrate
2013 µg/L 20%
of the EPA limit 10000 µg/L
worst single sample: 2070 µg/L
40/46 SYR4 2012–2019
Dibromochloromethane
6.31 µg/L
No EPA limit set
worst single sample: 9 µg/L
38/42 SYR4 2012–2019
Bromodichloromethane
9.48 µg/L
No EPA limit set
worst single sample: 16 µg/L
37/42 SYR4 2012–2019
Chloroform
10.65 µg/L
No EPA limit set
worst single sample: 16 µg/L
31/42 SYR4 2012–2019
Lead
0.00050 mg/L 3.3%
of the EPA limit 0.0150 mg/L
 24/24 LCR 2025
Bromoform
2.49 µg/L
No EPA limit set
worst single sample: 2.9 µg/L
22/42 SYR4 2012–2019
Nitrate-Nitrite
2013 µg/L 20%
of the EPA limit 10000 µg/L
worst single sample: 2070 µg/L
20/23 SYR4 2012–2019
TTHM
39.1 µg/L 49%
of the EPA limit 80 µg/L
worst single sample: 41.8 µg/L
13/13 SYR4 2012–2019
Dichloroacetic Acid
3.09 µg/L
No EPA limit set
worst single sample: 3.2 µg/L
12/12 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
6.36 µg/L 11%
of the EPA limit 60 µg/L
worst single sample: 6.8 µg/L
12/12 SYR4 2012–2019
Dibromoacetic Acid
2.6 µg/L
No EPA limit set
 11/12 SYR4 2012–2019
Gross Beta Particle Activity
29.972 pCi/L
No EPA limit set
worst single sample: 30 pCi/L
9/15 SYR4 2013–2018
Barium
28.5 µg/L 1.4%
of the EPA limit 2000 µg/L
worst single sample: 30 µg/L
7/7 SYR4 2012–2018
Asbestos
0.2000 MFL 2.9%
of the EPA limit 7 MFL
 3/6 SYR4 2013–2015
Trichloroacetic Acid
3.65 µg/L
No EPA limit set
worst single sample: 3.8 µg/L
3/12 SYR4 2012–2019
Combined Radium (-226 And -228)
2.981 pCi/L 60%
of the EPA limit 5 pCi/L
worst single sample: 3.1 pCi/L
2/19 SYR4 2013–2018
Chromium
1.2 µg/L 1.2%
of the EPA limit 100 µg/L
 1/7 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
0.2200 pCi/L 1.5%
of the EPA limit 15 pCi/L
 1/19 SYR4 2013–2018
87 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, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
LOWRY, PAUL C.
Phone
860-944-9655
Email
[email protected]

Frequently asked questions about Ctwc - Crystal

Is Ctwc - Crystal tap water safe to drink?

EPA monitoring detected 24 contaminants in Ctwc - Crystal'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 Ctwc - Crystal's water?

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

How many people does Ctwc - Crystal serve?

Ctwc - Crystal reports serving 6,378 people in Connecticut, per its EPA record.

Has Ctwc - Crystal had any water quality violations?

The EPA has 300 violations on file for Ctwc - Crystal, of which 10 are health-based (a contaminant limit or required treatment was breached) and 0 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.