# Lannon Water Utility: health-based drinking water violation (stage 1 disinfectants and disinfection byproducts rule) in Lannon, WI

**Score:** 35/100

| Field | Value |
|---|---|
| Water system | Lannon Water Utility |
| PWSID | WI2686008 |
| System type | Community water system |
| Owner type | Local government |
| Population served | 172 |
| Location | Lannon, WI |
| Contaminant | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Rule group | Disinfectants and disinfection byproducts |
| Compliance period | 2026-05-02 |
| Status | Returned to compliance |
| Returned to compliance | 2026-05-07 |
| Public notice tier | 2 |

## Why this score
- Community water system.

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) via Envirofacts and EPA ECHO (https://echo.epa.gov/detailed-facility-report?fid=110047516951). Last refreshed: 2026-11-04T06:06:47.254Z.
From EPA SDWIS federal data, which lags state records by up to a quarter. A violation is a regulatory finding about a water system, not a statement about current water quality. Verify with the state drinking water program.