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Tap water quality report

Knollcrest Tax District

EPA monitoring tested this supplier for 73 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
13
detected
356
people served
17
health-based violations
Connecticut rankingsLead in ConnecticutPFAS in Connecticut
Water source
Ground water
Ownership
Local government
Counties served
Fairfield

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.

17
health-based violations
165
violations on file
1
still open
ViolationTypeStatusPeriod
TT Health-based Unaddressed 2024-10-17
TT Health-based Resolved 2023-10-30
TT Health-based Resolved 2023-10-30
TT Health-based Resolved 2023-10-30
TT Health-based Resolved 2023-10-30
MCL Health-based Resolved 2023-09-01 → 2023-09-30
MCL Health-based Resolved 2023-09-01 → 2023-09-30
MCL Health-based Resolved 2023-09-01 → 2023-09-30
MCL Health-based Resolved 2023-09-01 → 2023-09-30
MCL Health-based Resolved 1997-09-01 → 1997-09-30

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
100 µg/L 7.7%
of the EPA limit 1300 µg/L
 50/53 SYR4 2012–2019
Nitrate
900 µg/L 9%
of the EPA limit 10000 µg/L
 18/18 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2025
Lead
3 µg/L 20%
of the EPA limit 15 µg/L
 15/53 SYR4 2012–2019
Nitrate-Nitrite
900 µg/L 9%
of the EPA limit 10000 µg/L
 9/9 SYR4 2012–2019
Combined Uranium
1.4 µg/L 4.7%
of the EPA limit 30 µg/L
 7/7 SYR4 2013–2017
Fluoride
400 µg/L 10%
of the EPA limit 4000 µg/L
 3/3 SYR4 2014–2019
Barium
30 µg/L 1.5%
of the EPA limit 2000 µg/L
 2/3 SYR4 2014–2019
Combined Radium (-226 And -228)
1.15 pCi/L 23%
of the EPA limit 5 pCi/L
 2/6 SYR4 2013–2017
Antimony, Total
1 µg/L 17%
of the EPA limit 6 µg/L
 1/3 SYR4 2014–2019
Cadmium
1.6 µg/L 32%
of the EPA limit 5 µg/L
 1/3 SYR4 2014–2019
Chromium
4 µg/L 4%
of the EPA limit 100 µg/L
 1/3 SYR4 2014–2019
Selenium
2 µg/L 4%
of the EPA limit 50 µg/L
 1/3 SYR4 2014–2019
60 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CRONK, MARK S.
Phone
203-746-1356
Email
mscronk26@gmail.com

Frequently asked questions about Knollcrest Tax District

Is Knollcrest Tax District tap water safe to drink?

EPA monitoring detected 13 contaminants in Knollcrest Tax District'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 Knollcrest Tax District's water?

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

How many people does Knollcrest Tax District serve?

Knollcrest Tax District reports serving 356 people in Connecticut, per its EPA record.

Has Knollcrest Tax District had any water quality violations?

The EPA has 165 violations on file for Knollcrest Tax District, of which 17 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.