Transient Non-Community · PWSID CT0859134

Great Hollow Lake

Serves 35 peopleGroundwaterOwner: Local GovernmentMonroe, Connecticut
Nothing open right now.

On record since 2020: 9 violations. 1 over the limit · 3 treatment lapses · 3 missed or late tests · 2 notices or reports. Most recent began 2024-04-01.

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 lapse
3Missed or late test
2Notice or report

More violations on record than 66% 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

2005201020152020 · Treatment lapse: 120202021 · Over the limit: 12021 · Treatment lapse: 12022 · Treatment lapse: 12022 · Missed or late test: 12022 · Notice or report: 12023 · Missed or late test: 12023 · Notice or report: 12024 · Missed or late test: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
11% over the limit · 133% treatment lapse · 333% missed or late test · 322% notice or report · 2

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

Every violation on record

  1. 2024-04-01E. ColiFailure to Conduct Assessment MonitoringBack in compliance
  2. 2023-07-13Public NoticePN Violation for NPDWR ViolationBack in compliance
  3. 2023-04-01Revised Total Coliform RuleMONBack in compliance
  4. 2022-09-13Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2022-09-13Revised Total Coliform RuleTTBack in compliance
  6. 2022-04-01Revised Total Coliform RuleMONBack in compliance
  7. 2021-09-01Revised Total Coliform RuleMCLBack in compliance
  8. 2021-08-07Revised Total Coliform RuleTTBack in compliance
  9. 2020-08-08Revised Total Coliform RuleTTBack in compliance

System details

Population served35
Service connections4
Water sourceGroundwater
System typeTransient Non-Community
OwnerLocal Government
StatusActive
CityMonroe
EPA ZIP on file06468

Areas served

  • Monroe, Fairfield County

Reading this record

Great Hollow Lake is a transient non-community that draws from groundwater and serves about 35 people in Monroe, 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.