JEFFERSON WATER DEPARTMENT
Iowa — Community Water System — PWSID: IA3742004
System Information
| PWSID | IA3742004 |
| System Name | JEFFERSON WATER DEPARTMENT |
| 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 | JEFFERSON |
| ZIP Code | 50129 |
| Address | ATTN WATER SUPT |
| Organization | JEFFERSON WATER DEPARTMENT |
| Phone | 515-386-2611 |
Population & Service
| Population Served | 4,182 |
| Service Connections | 2,080 |
Drinking Water Violations (28)
This water system has 28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2020 | Apr 30, 2020 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Apr 30, 2020 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2020 | Apr 30, 2020 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Apr 30, 2020 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2020 | Apr 30, 2020 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Apr 30, 2020 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2020 | Apr 30, 2020 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Apr 30, 2020 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2020 | Apr 30, 2020 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Apr 30, 2020 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2020 | Apr 30, 2020 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Apr 30, 2020 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2020 | Apr 30, 2020 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Apr 30, 2020 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2020 | Apr 30, 2020 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Apr 30, 2020 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Apr 1, 2019 | Jun 30, 2019 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Jun 30, 2019 | Nitrate Rule |
| Apr 1, 2019 | Jun 30, 2019 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Jun 30, 2019 | Nitrate Rule |
| Apr 1, 2019 | Jun 30, 2019 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Jun 30, 2019 | Nitrate Rule |
| Apr 1, 2019 | Jun 30, 2019 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Jun 30, 2019 | Nitrate Rule |
| Jul 1, 1997 | Sep 30, 1997 | Toluene | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 1997 | Volatile Organic Chemicals |
| Jul 1, 1997 | Sep 30, 1997 | Toluene | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 1997 | Volatile Organic Chemicals |
| Jul 1, 1997 | Sep 30, 1997 | Toluene | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 1997 | Volatile Organic Chemicals |
| Jun 1, 1996 | Jun 30, 1996 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 1996 | Total Coliform Rule |
| Jun 1, 1996 | Jun 30, 1996 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 1996 | Total Coliform Rule |
| Jun 1, 1996 | Jun 30, 1996 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 1996 | Total Coliform Rule |
| Oct 1, 1995 | Oct 31, 1995 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 1995 | Total Coliform Rule |
| Oct 1, 1995 | Oct 31, 1995 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 1995 | Total Coliform Rule |
| Oct 1, 1995 | Oct 31, 1995 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 1995 | Total Coliform Rule |
| Oct 1, 1995 | Oct 31, 1995 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 10, 1995 | Total Coliform Rule |
| Oct 1, 1995 | Oct 31, 1995 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 10, 1995 | Total Coliform Rule |
| — | — | — | No | No | — | — | — | — | — | — | |
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| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — |
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.