Community Water System · PWSID CT0800011

Meriden Water Division

Serves 58,441 peopleSurface WaterOwner: Local GovernmentMeriden, Connecticut
2 open treatment violations.

Open for: Groundwater Rule. EPA counts treatment-technique violations as health-based: a required protective step was not done. It is not a measurement of contamination.

On record since 1993: 16 violations. 1 over the limit · 3 treatment lapses · 4 missed or late tests · 8 notices or reports. Most recent began 2025-08-10.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

1Over the limit
3Treatment lapse2 open
4Missed or late test
8Notice or report2 open

More violations on record than 79% of active water systems in Connecticut. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

1993 · Treatment lapse: 119952000200520102014 · Notice or report: 22014 · Notice or report: 22015 · Missed or late test: 12015 · Notice or report: 120152017 · Missed or late test: 22017 · Missed or late test: 22017 · Notice or report: 22017 · Notice or report: 22018 · Over the limit: 120202022 · Missed or late test: 12024 · Notice or report: 12025 · Treatment lapse: 22025 · Treatment lapse: 22025 · Notice or report: 22025 · Notice or report: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
6% over the limit · 119% treatment lapse · 325% missed or late test · 450% notice or report · 8

Across Connecticut, 76% of violations are missed or late tests and 1% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Total Haloacetic Acids (HAA5)2018-01-01 · Total Haloacetic Acids (HAA5): measured 0.0620 MG/L vs limit 0.0600 MG/L (1.0×)
Each dot is one over-the-limit violation: the measured value divided by the limit it broke, on a log scale. Most legal limits for chemicals are running averages set for a lifetime of drinking, so “just over” and “ten times over” are very different news. Hover a dot for the numbers.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 54 results on file · action level 15 ppb

3.5 ppb
2 ppb
2 ppb
2 ppb
1.5 ppb
1.3 ppb
1.2 ppb
1.1 ppb
1 ppb
1 ppb
0.9 ppb
0.7 ppb
0.6 ppb
0.6 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb

Open now (4)

  1. 2025-08-10Consumer Confidence RuleCCR Inadequate ReportingOpen
  2. 2025-07-31Groundwater Rule ×2Failure To Address DeficiencyOpen
  3. 2025-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen

Every violation on record

  1. 2025-08-10Consumer Confidence RuleCCR Inadequate ReportingOpen
  2. 2025-07-31Groundwater Rule ×2Failure To Address DeficiencyOpen
  3. 2025-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen
  4. 2024-08-10Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  5. 2022-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  6. 2018-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0620 MG/L · limit 0.0600 MG/LBack in compliance
  7. 2017-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  8. 2017-08-10Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  9. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  10. 2017-04-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  11. 2015-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  12. 2015-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  13. 2014-08-10Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  14. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  15. 1993-07-01Lead and Copper RuleOCCT/SOWT Study/RecommendationBack in compliance

System details

Population served58,441
Service connections17,630
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityMeriden
EPA ZIP on file06450

Areas served

  • New Haven County

Reading this record

Meriden Water Division is a community water system that draws from surface water and serves about 58,441 people in Meriden, Connecticut. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.