Non-Transient Non-Community · PWSID IL3037291

Indian Knoll School Dist 33

Serves 600 peopleGroundwaterOwner: Public/PrivateWest Chicago, IllinoisServes a school or daycare
Nothing open right now.

On record since 2001: 68 violations. 1 treatment lapse · 62 missed or late tests · 5 notices or reports. Most recent began 2024-10-17.

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
62Missed or late test
5Notice or report

More violations on record than 97% 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

2001 · Missed or late test: 12005201020152016 · Missed or late test: 12017 · Missed or late test: 212017 · Missed or late test: 212017 · Missed or late test: 212017 · Missed or late test: 212017 · Missed or late test: 212017 · Missed or late test: 212017 · Missed or late test: 212017 · Missed or late test: 212017 · Missed or late test: 212017 · Missed or late test: 212017 · Missed or late test: 212018 · Missed or late test: 242018 · Missed or late test: 242018 · Missed or late test: 242018 · Missed or late test: 242018 · Missed or late test: 242018 · Missed or late test: 242018 · Missed or late test: 242018 · Missed or late test: 242018 · Missed or late test: 242018 · Missed or late test: 242018 · Missed or late test: 242018 · Missed or late test: 242020 · Missed or late test: 112020 · Missed or late test: 112020 · Missed or late test: 112020 · Missed or late test: 112020 · Missed or late test: 112020 · Missed or late test: 1120202021 · Missed or late test: 12022 · Missed or late test: 22023 · Missed or late test: 12024 · Treatment lapse: 12024 · Notice or report: 52024 · Notice or report: 52024 · Notice or report: 52025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
1% treatment lapse · 191% missed or late test · 627% notice or report · 5

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

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 3 results on file · action level 15 ppb

0 ppb
0 ppb
0 ppb

Every violation on record

  1. 2024-10-17Lead service line inventoryTTBack in compliance
  2. 2024-10-17Lead service line inventoryRPTBack in compliance
  3. 2024-02-15Public Notice ×3PN Violation for NPDWR ViolationBack in compliance
  4. 2024-01-24Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2023-01-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  6. 2022-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  7. 2022-01-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  8. 2021-10-11Lead and Copper RuleLead Consumer NoticeBack in compliance
  9. 2020-01-01SeleniumMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2020-01-01Thallium, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2020-01-01Beryllium, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2020-01-01Antimony, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2020-01-01MercuryMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2020-01-01CyanideMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2020-01-01ChromiumMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2020-01-01CadmiumMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2020-01-01BariumMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2020-01-01CarbofuranMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2020-01-01OxamylMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2018-01-01NitrateMonitoring, RegularBack in compliance
  21. 2018-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  22. 2018-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  23. 2018-01-01StyreneMonitoring, RegularBack in compliance
  24. 2018-01-01EthylbenzeneMonitoring, RegularBack in compliance
  25. 2018-01-01TolueneMonitoring, RegularBack in compliance
Show the other 41 entries
  1. 2018-01-01BenzeneMonitoring, RegularBack in compliance
  2. 2018-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  3. 2018-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  4. 2018-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  5. 2018-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  6. 2018-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  7. 2018-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  8. 2018-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  9. 2018-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  10. 2018-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  11. 2018-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  12. 2018-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  13. 2018-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  14. 2018-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  15. 2018-01-01DichloromethaneMonitoring, RegularBack in compliance
  16. 2018-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  17. 2018-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  18. 2018-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  19. 2017-01-01ChlordaneMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2017-01-01Ethylene DibromideMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2017-01-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2017-01-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularPeriod ended · no return to compliance on file
  23. 2017-01-01PentachlorophenolMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2017-01-012, 4, 5-TpMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2017-01-012, 4-DMonitoring, RegularPeriod ended · no return to compliance on file
  26. 2017-01-01Heptachlor epoxideMonitoring, RegularPeriod ended · no return to compliance on file
  27. 2017-01-01HeptachlorMonitoring, RegularPeriod ended · no return to compliance on file
  28. 2017-01-01LassoMonitoring, RegularPeriod ended · no return to compliance on file
  29. 2017-01-01AtrazineMonitoring, RegularPeriod ended · no return to compliance on file
  30. 2017-01-01CarbofuranMonitoring, RegularPeriod ended · no return to compliance on file
  31. 2017-01-01PicloramMonitoring, RegularPeriod ended · no return to compliance on file
  32. 2017-01-01SimazineMonitoring, RegularPeriod ended · no return to compliance on file
  33. 2017-01-01OxamylMonitoring, RegularPeriod ended · no return to compliance on file
  34. 2017-01-01GlyphosateMonitoring, RegularPeriod ended · no return to compliance on file
  35. 2017-01-01EndothallMonitoring, RegularPeriod ended · no return to compliance on file
  36. 2017-01-01DiquatMonitoring, RegularPeriod ended · no return to compliance on file
  37. 2017-01-01ToxapheneMonitoring, RegularPeriod ended · no return to compliance on file
  38. 2017-01-01MethoxychlorMonitoring, RegularPeriod ended · no return to compliance on file
  39. 2017-01-01Bhc-GammaMonitoring, RegularPeriod ended · no return to compliance on file
  40. 2016-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  41. 2001-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance

System details

Population served600
Service connections1
Water sourceGroundwater
System typeNon-Transient Non-Community
OwnerPublic/Private
StatusActive
CityWest Chicago
EPA ZIP on file60185

Areas served

  • Dupage County

Reading this record

Indian Knoll School Dist 33 is a non-transient non-community that draws from groundwater and serves about 600 people in West Chicago, 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.