Community Water System · PWSID PA6430062

Forrest Brooke MHP

Serves 491 peopleGroundwaterOwner: PrivateOak Brook, Illinois
Nothing open right now.

On record since 2004: 20 violations. 2 treatment lapses · 10 missed or late tests · 8 notices or reports. Most recent began 2023-05-01.

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
2Treatment lapse
10Missed or late test
8Notice or report

More violations on record than 90% 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

2004 · Notice or report: 22004 · Notice or report: 22005 · Notice or report: 120052006 · Notice or report: 12008 · Missed or late test: 12010 · Notice or report: 1201020152016 · Missed or late test: 42016 · Missed or late test: 42016 · Missed or late test: 42016 · Missed or late test: 42016 · Notice or report: 120202021 · Missed or late test: 32021 · Missed or late test: 32021 · Missed or late test: 32022 · Missed or late test: 22022 · Missed or late test: 22022 · Notice or report: 22022 · Notice or report: 22023 · Treatment lapse: 22023 · Treatment lapse: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
10% treatment lapse · 250% missed or late test · 1040% notice or report · 8

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

Every violation on record

  1. 2023-05-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  2. 2023-04-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  3. 2022-10-11Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  4. 2022-08-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  5. 2022-06-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  6. 2021-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  7. 2021-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  8. 2021-04-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  9. 2016-10-01Radium-228Monitoring, RegularBack in compliance
  10. 2016-10-01Radium-226Monitoring, RegularBack in compliance
  11. 2016-10-01Combined UraniumMonitoring, RegularBack in compliance
  12. 2016-10-01Gross Alpha, Excl. Radon and UMonitoring, RegularBack in compliance
  13. 2016-04-01Revised Total Coliform RuleOtherBack in compliance
  14. 2010-11-11Public NoticePN Violation for NPDWR ViolationBack in compliance
  15. 2008-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  16. 2006-10-11Public NoticePN Violation for NPDWR ViolationBack in compliance
  17. 2005-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  18. 2004-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  19. 2004-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served491
Service connections280
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityOak Brook
EPA ZIP on file60523

Areas served

  • Mercer County

Reading this record

Forrest Brooke MHP is a community water system that draws from groundwater and serves about 491 people in Oak Brook, 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.