OCONOMOWOC WATERWORKS
Wisconsin — Community Water System — PWSID: WI2680227
System Information
| PWSID | WI2680227 |
| System Name | OCONOMOWOC WATERWORKS |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 28, 1981 |
| Last Reported | Dec 17, 2025 |
Location & Contact
| State | Wisconsin |
| City | Oconomowoc |
| ZIP Code | 53066 |
| Address | 808 S WORTHINGTON ST |
| Organization | OCONOMOWOC CITY OF |
| Phone | — |
Population & Service
| Population Served | 15,805 |
| Service Connections | 1 |
Drinking Water Violations (10)
This water system has 10 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2014 | Dec 31, 2014 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Dec 31, 2014 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2014 | Dec 31, 2014 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Dec 31, 2014 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2014 | Dec 31, 2014 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Dec 31, 2014 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2014 | Dec 31, 2014 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Dec 31, 2014 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2007 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 31, 2007 | Consumer Confidence Rule |
| Jul 1, 2007 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 31, 2007 | Consumer Confidence Rule |
| Jul 1, 2007 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 31, 2007 | Consumer Confidence Rule |
| Apr 1, 2006 | — | Public Notice | Other | No | No | — | — | — | Resolved | Feb 22, 2011 | Public Notice Rule and Revised PN Rule |
| Jan 1, 2005 | Dec 31, 2005 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | Dec 31, 2005 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | Lead and Copper Rule |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.