Community Water System · PWSID WI1140142

Waupun Correctional Inst

Serves 3,706 peopleGroundwaterOwner: StateMadison, Wisconsin
Nothing open that measures the water, but 1 open testing or paperwork violation.

A missed test is not evidence of bad water. It also is not evidence of good water: for that period nobody checked.

On record since 2012: 13 violations. 6 over the limit · 3 missed or late tests · 4 notices or reports. Most recent began 2024-07-01.

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

6Over the limit
0Treatment lapse
3Missed or late test1 open
4Notice or report

More violations on record than 96% of active water systems in Wisconsin. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

200520102012 · Missed or late test: 12015 · Missed or late test: 22015 · Missed or late test: 220152019 · Over the limit: 12020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Notice or report: 22020 · Notice or report: 220202023 · Over the limit: 12024 · Notice or report: 22024 · Notice or report: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
46% over the limit · 623% missed or late test · 331% notice or report · 4

Across Wisconsin, 54% of violations are missed or late tests and 5% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Combined Radium (-226 and...2023-04-01 · Combined Radium (-226 and -228): measured 5.65 PCI/L vs limit 5.50 PCI/L (1.0×)2020-10-01 · Combined Radium (-226 and -228): measured 5.52 PCI/L vs limit 5.50 PCI/L (1.0×)2020-07-01 · Combined Radium (-226 and -228): measured 5.52 PCI/L vs limit 5.50 PCI/L (1.0×)2020-04-01 · Combined Radium (-226 and -228): measured 5.92 PCI/L vs limit 5.50 PCI/L (1.1×)2020-01-01 · Combined Radium (-226 and -228): measured 5.90 PCI/L vs limit 5.50 PCI/L (1.1×)2019-10-01 · Combined Radium (-226 and -228): measured 5.92 PCI/L vs limit 5.50 PCI/L (1.1×)
Each dot is one over-the-limit violation: the measured value divided by the limit it broke, on a log scale. Most legal limits for chemicals are running averages set for a lifetime of drinking, so “just over” and “ten times over” are very different news. Hover a dot for the numbers.

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 7 results on file · action level 15 ppb

8.5 ppb
7.7 ppb
6.3 ppb
4.1 ppb
3.8 ppb
0.87 ppb
0.71 ppb

Open now (1)

  1. 2012-01-01Lead and Copper RuleLead Consumer NoticeOpen

Every violation on record

  1. 2024-07-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  2. 2024-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  3. 2023-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 5.65 PCI/L · limit 5.50 PCI/LPeriod ended · no return to compliance on file
  4. 2020-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 5.52 PCI/L · limit 5.50 PCI/LPeriod ended · no return to compliance on file
  5. 2020-09-08Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  6. 2020-07-01Combined Radium (-226 and -228)MCL, Averagemeasured 5.52 PCI/L · limit 5.50 PCI/LPeriod ended · no return to compliance on file
  7. 2020-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 5.92 PCI/L · limit 5.50 PCI/LPeriod ended · no return to compliance on file
  8. 2020-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 5.90 PCI/L · limit 5.50 PCI/LPeriod ended · no return to compliance on file
  9. 2019-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 5.92 PCI/L · limit 5.50 PCI/LPeriod ended · no return to compliance on file
  10. 2015-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  11. 2015-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  12. 2012-01-01Lead and Copper RuleLead Consumer NoticeOpen

System details

Population served3,706
Service connections1,372
Water sourceGroundwater
System typeCommunity Water System
OwnerState
StatusActive
CityMadison
EPA ZIP on file53704

Areas served

  • Waupun, Dodge County

Reading this record

Waupun Correctional Inst is a community water system that draws from groundwater and serves about 3,706 people in Madison, Wisconsin. 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.