Tap WaterIndex

← Connecticut

Tap water quality report

Scwa, North Stonington Division (Nst)

EPA monitoring tested this supplier for 72 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

72
contaminants tested
8
detected
1,860
people served
12
health-based violations
Connecticut rankingsLead in ConnecticutPFAS in Connecticut
Water source
Ground water
Ownership
Local government
Counties served
New London

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.

12
health-based violations
31
violations on file
3
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2017-07-01 → 2017-07-31
MCL Health-based Resolved 2017-07-01 → 2017-07-31
MCL Health-based Resolved 2017-07-01 → 2017-07-31
MCL Health-based Resolved 2017-07-01 → 2017-07-31
MCL Health-based Resolved 2014-07-01 → 2014-07-31
MCL Health-based Resolved 2014-07-01 → 2014-07-31
MCL Health-based Resolved 2014-07-01 → 2014-07-31
MCL Health-based Resolved 2014-07-01 → 2014-07-31
MCL Health-based Resolved 2007-01-01 → 2007-01-31
MCL Health-based Resolved 2007-01-01 → 2007-01-31

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
Nitrate
640 µg/L 6.4%
of the EPA limit 10000 µg/L
 18/18 SYR4 2012–2019
Copper
633.4 µg/L 49%
of the EPA limit 1300 µg/L
worst single sample: 719 µg/L
17/17 SYR4 2012–2018
Lead
6.5 µg/L 43%
of the EPA limit 15 µg/L
worst single sample: 7 µg/L
11/17 SYR4 2012–2018
Lead
0.0019 mg/L 13%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2025
Nitrate-Nitrite
628 µg/L 6.3%
of the EPA limit 10000 µg/L
worst single sample: 640 µg/L
9/9 SYR4 2012–2019
Barium
9.9 µg/L 0.5%
of the EPA limit 2000 µg/L
worst single sample: 10 µg/L
3/3 SYR4 2012–2018
Beryllium, Total
0.2000 µg/L 5%
of the EPA limit 4 µg/L
 1/3 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
6.38 pCi/L 43%
of the EPA limit 15 pCi/L
 1/3 SYR4 2013–2019
64 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-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEthylene DibromideEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CANSLER, JOSEPH
Phone
860-464-0232
Email
[email protected]

Frequently asked questions about Scwa, North Stonington Division (Nst)

Is Scwa, North Stonington Division (Nst) tap water safe to drink?

EPA monitoring detected 8 contaminants in Scwa, North Stonington Division (Nst)'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 Scwa, North Stonington Division (Nst)'s water?

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

How many people does Scwa, North Stonington Division (Nst) serve?

Scwa, North Stonington Division (Nst) reports serving 1,860 people in Connecticut, per its EPA record.

Has Scwa, North Stonington Division (Nst) had any water quality violations?

The EPA has 31 violations on file for Scwa, North Stonington Division (Nst), of which 12 are health-based (a contaminant limit or required treatment was breached) and 3 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.