31 GRIST MILL RD
PWSID: CT0419221 · Old Lyme, CT · Serves 30 people
31 GRIST MILL RD has 18 health-based violations out of 18 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
31 GRIST MILL RD (PWSID CT0419221) is a cws water system drawing from a groundwater source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 30 people in Old Lyme, CT, and is subject to primacy enforcement by the Connecticut drinking-water program.
The system's federal compliance record contains 18 total violations, with 18 classified as health-based (MCL exceedances or treatment-technique failures). 4 distinct contaminants have been cited, including E. coli, Total Coliform (RTCR), Fluoride. Recorded violations span 2015–2024.
A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Connecticut state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- CT0419221
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Old Lyme, CT
- Population Served
- 30
- Health Violations
- Yes (18)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| E. coli | 9 | 9 |
| Total Coliform (RTCR) | 6 | 6 |
| Fluoride | 2 | 2 |
| Gross Alpha | 1 | 1 |
Violation History (18)
| Contaminant | Health | Date |
|---|---|---|
| Gross Alpha | Yes | Oct 17, 2024 |
| Fluoride | Yes | Feb 8, 2020 |
| Fluoride | Yes | Feb 8, 2020 |
| E. coli | Yes | Jan 1, 2019 |
| E. coli | Yes | Jan 1, 2019 |
| E. coli | Yes | Jan 1, 2019 |
| E. coli | Yes | Oct 1, 2018 |
| E. coli | Yes | Oct 1, 2018 |
| E. coli | Yes | Nov 24, 2017 |
| E. coli | Yes | Nov 24, 2017 |
| E. coli | Yes | May 28, 2017 |
| E. coli | Yes | May 28, 2017 |
| Total Coliform (RTCR) | Yes | Nov 1, 2015 |
| Total Coliform (RTCR) | Yes | Nov 1, 2015 |
| Total Coliform (RTCR) | Yes | Aug 1, 2015 |
| Total Coliform (RTCR) | Yes | Aug 1, 2015 |
| Total Coliform (RTCR) | Yes | Jul 1, 2015 |
| Total Coliform (RTCR) | Yes | Jul 1, 2015 |
Frequently Asked Questions
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About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.