Non-Transient Non-Community · PWSID CT0691243

Killingly High School & Agricultural Ctr

Serves 1,400 peopleGroundwaterOwner: Local GovernmentDayville, Connecticut
1 open treatment violation.

Open for: Lead service line inventory. 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 2012: 35 violations. 3 treatment lapses · 30 missed or late tests · 2 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
3Treatment lapse1 open
30Missed or late test
2Notice or report1 open

More violations on record than 89% 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

200520102012 · Notice or report: 120152016 · Missed or late test: 12018 · Treatment lapse: 12019 · Treatment lapse: 12019 · Missed or late test: 22020 · Missed or late test: 120202022 · Missed or late test: 92022 · Missed or late test: 92022 · Missed or late test: 92022 · Missed or late test: 92022 · Missed or late test: 92023 · Missed or late test: 142023 · Missed or late test: 142023 · Missed or late test: 142023 · Missed or late test: 142023 · Missed or late test: 142023 · Missed or late test: 142023 · Missed or late test: 142024 · Treatment lapse: 12024 · Missed or late test: 32024 · Missed or late test: 32024 · Notice or report: 12025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
9% treatment lapse · 386% missed or late test · 306% notice or report · 2

Across Connecticut, 76% of violations are missed or late tests and 1% 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 10 results on file · action level 15 ppb

4.5 ppb
3.3 ppb
3 ppb
2.8 ppb
2.3 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb

Copper, 90th percentile 1 result on file · action level 1.3 mg/L

3.4 mg/L

Open now (2)

  1. 2024-10-17Lead service line inventoryRPTOpen
  2. 2024-10-17Lead service line inventoryTTOpen

Every violation on record

  1. 2024-10-17Lead service line inventoryRPTOpen
  2. 2024-10-17Lead service line inventoryTTOpen
  3. 2024-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  4. 2024-01-01Chlorine ×2Monitoring and Reporting (DBP)Back in compliance
  5. 2023-11-01Calcium ×2Water Quality Parameter M/RPeriod ended · no return to compliance on file
  6. 2023-11-01Temperature (Centigrade) ×2Water Quality Parameter M/RPeriod ended · no return to compliance on file
  7. 2023-11-01Alkalinity, Total ×2Water Quality Parameter M/RPeriod ended · no return to compliance on file
  8. 2023-11-01Conductivity @ 25 C Umhos/Cm ×2Water Quality Parameter M/RPeriod ended · no return to compliance on file
  9. 2023-11-01Orthophosphate ×2Water Quality Parameter M/RPeriod ended · no return to compliance on file
  10. 2023-11-01pHWater Quality Parameter M/RPeriod ended · no return to compliance on file
  11. 2023-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  12. 2023-01-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  13. 2023-01-01Revised Total Coliform RuleMONBack in compliance
  14. 2022-12-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  15. 2022-12-01Revised Total Coliform RuleMONBack in compliance
  16. 2022-11-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  17. 2022-11-01Revised Total Coliform RuleMONBack in compliance
  18. 2022-10-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  19. 2022-10-01Chlorine ×3Monitoring and Reporting (DBP)Back in compliance
  20. 2022-10-01Revised Total Coliform RuleMONBack in compliance
  21. 2020-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  22. 2019-05-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  23. 2019-03-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  24. 2019-03-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  25. 2018-08-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
Show the other 2 entries
  1. 2016-07-011, 3-DichloropropeneMonitoring, RegularBack in compliance
  2. 2012-10-12Public NoticePN Violation for NPDWR ViolationBack in compliance

System details

Population served1,400
Service connections1
Water sourceGroundwater
System typeNon-Transient Non-Community
OwnerLocal Government
StatusActive
CityDayville
EPA ZIP on file06241

Areas served

  • Killingly, Windham County

Reading this record

Killingly High School & Agricultural Ctr is a non-transient non-community that draws from groundwater and serves about 1,400 people in Dayville, 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.