Transient Non-Community · PWSID IL3110338

The Island on the Chain

Serves 200 peopleGroundwaterOwner: Public/PrivateAntioch, Illinois
Nothing open right now.

On record since 2017: 8 violations. 1 treatment lapse · 6 missed or late tests · 1 notice or report. Most recent began 2023-01-21.

None of them is a measurement of contaminated water.

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

0Over the limit
1Treatment lapse
6Missed or late test
1Notice or report

More violations on record than 75% of active water systems in Illinois. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2005201020152017 · Missed or late test: 12019 · Missed or late test: 12020 · Missed or late test: 22020 · Missed or late test: 220202021 · Treatment lapse: 12021 · Missed or late test: 12023 · Missed or late test: 12023 · Notice or report: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
13% treatment lapse · 175% missed or late test · 613% notice or report · 1

Across Illinois, 81% of violations are missed or late tests and 3% are water over a limit.

Every violation on record

  1. 2023-01-21Public NoticePN Violation for NPDWR ViolationBack in compliance
  2. 2023-01-01Revised Total Coliform RuleMONBack in compliance
  3. 2021-07-01Revised Total Coliform RuleTTBack in compliance
  4. 2021-01-01Revised Total Coliform RuleMONBack in compliance
  5. 2020-01-01NitrateMonitoring, RegularBack in compliance
  6. 2020-01-01Revised Total Coliform RuleMONBack in compliance
  7. 2019-01-01NitrateMonitoring, RegularBack in compliance
  8. 2017-01-01NitrateMonitoring, RegularBack in compliance

System details

Population served200
Service connections1
Water sourceGroundwater
System typeTransient Non-Community
OwnerPublic/Private
StatusActive
CityAntioch
EPA ZIP on file60002

Areas served

  • Lake County

Reading this record

The Island on the Chain is a transient non-community that draws from groundwater and serves about 200 people in Antioch, Illinois. 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.