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Tap water quality report

St. Thomas More School-Main

EPA monitoring tested this supplier for 80 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

80
contaminants tested
16
detected
270
people served
55
health-based violations
Connecticut rankingsLead in ConnecticutPFAS in Connecticut
Water source
Ground water
Ownership
Private
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.

55
health-based violations
134
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Archived 2025-07-01 → 2025-12-31
TT Health-based Resolved 2014-03-02
TT Health-based Resolved 2014-03-02
TT Health-based Resolved 2013-08-30
TT Health-based Resolved 2013-08-30
MCL Health-based Resolved 1996-08-01 → 1996-08-31
MCL Health-based Resolved 1996-08-01 → 1996-08-31
MCL Health-based Resolved 1996-08-01 → 1996-08-31
MCL Health-based Resolved 1996-08-01 → 1996-08-31
MCL Health-based Resolved 1996-07-01 → 1996-07-31

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
Copper
567.1 µg/L 44%
of the EPA limit 1300 µg/L
worst single sample: 1150 µg/L
148/149 SYR4 2012–2019
Lead
30.4 µg/L 203%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 53 µg/L
87/149 SYR4 2012–2019
Lead
0.0011 mg/L 7.3%
of the EPA limit 0.0150 mg/L
 46/46 LCR 2026
Nitrate
2460 µg/L 25%
of the EPA limit 10000 µg/L
 14/16 SYR4 2012–2019
Bromodichloromethane
2.28 µg/L
No EPA limit set
worst single sample: 2.6 µg/L
9/11 SYR4 2012–2019
Chloroform
6.1 µg/L
No EPA limit set
worst single sample: 6.9 µg/L
9/11 SYR4 2012–2019
TTHM
9.529 µg/L 12%
of the EPA limit 80 µg/L
worst single sample: 10.6 µg/L
8/8 SYR4 2012–2019
Nitrate-Nitrite
2298 µg/L 23%
of the EPA limit 10000 µg/L
worst single sample: 2460 µg/L
7/8 SYR4 2012–2019
Dichloroacetic Acid
11.875 µg/L
No EPA limit set
worst single sample: 15 µg/L
6/8 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
14 µg/L 23%
of the EPA limit 60 µg/L
worst single sample: 17 µg/L
6/8 SYR4 2012–2019
Dibromochloromethane
1.08 µg/L
No EPA limit set
worst single sample: 1.1 µg/L
5/11 SYR4 2012–2019
Barium
9.8 µg/L 0.5%
of the EPA limit 2000 µg/L
worst single sample: 10 µg/L
3/3 SYR4 2012–2018
Fluoride
1085 µg/L 27%
of the EPA limit 4000 µg/L
worst single sample: 1100 µg/L
3/3 SYR4 2012–2018
Trichloroacetic Acid
2.18 µg/L
No EPA limit set
worst single sample: 2.2 µg/L
3/8 SYR4 2012–2019
Beryllium, Total
0.1000 µg/L 2.5%
of the EPA limit 4 µg/L
 1/3 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
3.42 pCi/L 23%
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, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HANRAHAN, SEAN
Phone
860-367-4799
Email
[email protected]

Frequently asked questions about St. Thomas More School-Main

Is St. Thomas More School-Main tap water safe to drink?

EPA monitoring detected 16 contaminants in St. Thomas More School-Main'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 St. Thomas More School-Main's water?

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

How many people does St. Thomas More School-Main serve?

St. Thomas More School-Main reports serving 270 people in Connecticut, per its EPA record.

Has St. Thomas More School-Main had any water quality violations?

The EPA has 134 violations on file for St. Thomas More School-Main, of which 55 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.