WILLIAMS WATER SUPPLY
Iowa — Community Water System — PWSID: IA4070022
System Information
| PWSID | IA4070022 |
| System Name | WILLIAMS WATER SUPPLY |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 07 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 27, 1979 |
| Last Reported | Dec 19, 2025 |
Location & Contact
| State | Iowa |
| City | WILLIAMS |
| ZIP Code | 50271 |
| Address | ATTN TODD HIEMSTRA WATER SUPT |
| Organization | WILLIAMS WATER SUPPLY |
| Phone | 515-854-2260 |
Population & Service
| Population Served | 315 |
| Service Connections | 212 |
Drinking Water Violations (27)
This water system has 27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| May 1, 2022 | May 31, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | May 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| May 1, 2022 | May 31, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | May 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| May 1, 2022 | May 31, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | May 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| May 1, 2022 | May 31, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | May 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| May 1, 2022 | May 31, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | May 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| May 1, 2022 | May 31, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | May 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| May 1, 2022 | May 31, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | May 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| May 1, 2022 | May 31, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | May 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 1986 | Jun 30, 1989 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 1989 | Inorganic Chemicals |
| Jul 1, 1986 | Jun 30, 1989 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 1989 | Inorganic Chemicals |
| Jul 1, 1986 | Jun 30, 1989 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 1989 | Inorganic Chemicals |
| Jul 1, 1986 | Jun 30, 1989 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 1989 | Inorganic Chemicals |
| Jul 1, 1986 | Jun 30, 1989 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 1989 | Inorganic Chemicals |
| Jul 1, 1986 | Jun 30, 1989 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 1989 | Inorganic Chemicals |
| Jul 1, 1986 | Jun 30, 1989 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 1989 | Inorganic Chemicals |
| Jul 1, 1986 | Jun 30, 1989 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Jun 30, 1989 | Inorganic Chemicals |
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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.