Old Lyme Water Quality
Connecticut
According to EPA SDWIS, Old Lyme, Connecticut is served by 11 community water systems covering about 937 people. The same extract lists 22 health-based violation records, most recently coded 5200 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Old Lyme, Connecticut is delivered through 11 EPA-regulated community water systems serving an estimated 937 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 22 violation records across the 11 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 5 distinct EPA contaminant codes: LEAD AND COPPER RULE REVISIONS, Groundwater Rule, Revised Total Coliform Rule, Coliform (TCR), Lead and Copper Rule.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Connecticut drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| CHADWICK HOMEOWNERS ASSN., INC. | 292 | 1 | Health |
| ALCOVY MOBILE HOME PARK | 120 | 0 | Clean |
| RIVER'S REACH | 115 | 0 | Clean |
| WHISPERING PINES MHP | 94 | 0 | Clean |
| DEERWOOD MANOR DRINKING WATER SYSTEM | 84 | 0 | Clean |
| MILE CREEK APARTMENTS | 60 | 2 | Health |
| LYMEWOOD ELDERLY HOUSING | 50 | 1 | Health |
| GARFIELD DRIVE MOBILE HOME PARK | 42 | 0 | Clean |
| 31 GRIST MILL RD | 30 | 18 | Health |
| PINE MEADOWS SUBDIVISION | 25 | 0 | Clean |
| PLEASANT OAKS SUBDIVISION | 25 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| LYMEWOOD ELDERLY HOUSING | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| MILE CREEK APARTMENTS | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| CHADWICK HOMEOWNERS ASSN., INC. | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| 31 GRIST MILL RD | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| 31 GRIST MILL RD | Groundwater Rule | 2020-02-08 |
| 31 GRIST MILL RD | Groundwater Rule | 2020-02-08 |
| 31 GRIST MILL RD | Revised Total Coliform Rule | 2019-01-01 |
| 31 GRIST MILL RD | Revised Total Coliform Rule | 2019-01-01 |
| 31 GRIST MILL RD | Revised Total Coliform Rule | 2019-01-01 |
| 31 GRIST MILL RD | Revised Total Coliform Rule | 2018-10-01 |
| 31 GRIST MILL RD | Revised Total Coliform Rule | 2018-10-01 |
| 31 GRIST MILL RD | Revised Total Coliform Rule | 2017-11-24 |
| 31 GRIST MILL RD | Revised Total Coliform Rule | 2017-11-24 |
| 31 GRIST MILL RD | Revised Total Coliform Rule | 2017-05-28 |
| 31 GRIST MILL RD | Revised Total Coliform Rule | 2017-05-28 |
| 31 GRIST MILL RD | Coliform (TCR) | 2015-11-01 |
| 31 GRIST MILL RD | Coliform (TCR) | 2015-11-01 |
| 31 GRIST MILL RD | Coliform (TCR) | 2015-08-01 |
| 31 GRIST MILL RD | Coliform (TCR) | 2015-08-01 |
| 31 GRIST MILL RD | Coliform (TCR) | 2015-07-01 |
| 31 GRIST MILL RD | Coliform (TCR) | 2015-07-01 |
| MILE CREEK APARTMENTS | Lead and Copper Rule | 1994-07-01 |
What are Old Lyme's health-based records for?
Old Lyme's health-based violation records carry 5 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Revised Total Coliform Rule | 9 | 1 |
| Coliform (TCR) | 6 | 1 |
| Lead and Copper Rule Revisions | 4 | 4 |
| Groundwater Rule | 2 | 1 |
| Lead and Copper Rule | 1 | 1 |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Old Lyme, Connecticut? ▼
How many water violations does Old Lyme have in this EPA extract? ▼
What contaminants were found in Old Lyme water? ▼
How many water systems serve Old Lyme? ▼
Where does Old Lyme get its drinking water? ▼
How does Old Lyme compare in Connecticut?
Of the 151 Connecticut places with at least one community water system on file, Old Lyme ranks #6 by number of systems (11).
Either side of it: Gales Ferry (17), Danbury (12), Tolland (11), East Hartford (10)
About This Data
Figures here are the current EPA SDWIS extract joined to the 11 community water systems whose service area lists Old Lyme, ranked against the 151 Connecticut places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.