No health-based violations on EPA record since 2016.
Serves about 3,789 people (1,692 connections) with groundwater from its own wells, and buys water from Waterbury Water Department and CTWC.
From EPA's record for CT1400011. PurityMap is independent of CTWC.
Are you this utility? Correct this listing →
No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from May 2024 to November 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2024-06-18 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-06 | UCMR5 Analytical Results: CTWC - NAUGATUCK REG-THOMASTON SYSTEM (CT1400011) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure
Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Get PurityMap updates about this water system.
Follow this water →CTWC's phone number on EPA record is 860-664-6125. Its mailing address is 93 West Main Street, CLINTON, CT 06413.
According to EPA's record, CTWC uses groundwater from its own wells, and buys water from Waterbury Water Department and CTWC.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in CTWC's latest lead and copper round, which ended in December 2024, was 2.8 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for CTWC. Its phone number on EPA record is 860-664-6125. Its mailing address on EPA record is 93 West Main Street, CLINTON, CT 06413. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.