COLO WATER SUPPLY
Iowa — Community Water System — PWSID: IA8520061
System Information
| PWSID | IA8520061 |
| System Name | COLO WATER SUPPLY |
| System Type | Community Water System |
| Water Source | Ground Water Purchased |
| 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 | COLO |
| ZIP Code | 50056 |
| Address | ATTN CITY CLERK |
| Organization | COLO WATER SUPPLY |
| Phone | 641-377-2238 |
Population & Service
| Population Served | 853 |
| Service Connections | 362 |
Drinking Water Violations (30)
This water system has 30 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2016 | Jul 31, 2016 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jul 31, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2016 | Jul 31, 2016 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jul 31, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2016 | Jul 31, 2016 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jul 31, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2016 | Jul 31, 2016 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jul 31, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2016 | Jul 31, 2016 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jul 31, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2016 | Jul 31, 2016 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jul 31, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2016 | Jul 31, 2016 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jul 31, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2016 | Jul 31, 2016 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jul 31, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jun 1, 2015 | Jun 30, 2015 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2015 | Total Coliform Rule |
| Jun 1, 2015 | Jun 30, 2015 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2015 | Total Coliform Rule |
| Jun 1, 2015 | Jun 30, 2015 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2015 | Total Coliform Rule |
| Jun 1, 2015 | Jun 30, 2015 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2015 | Total Coliform Rule |
| Aug 1, 1998 | Aug 31, 1998 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 1998 | Total Coliform Rule |
| Aug 1, 1998 | Aug 31, 1998 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 1998 | Total Coliform Rule |
| Aug 1, 1998 | Aug 31, 1998 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 1998 | Total Coliform Rule |
| Feb 1, 1998 | Mar 2, 1998 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 2, 1998 | Total Coliform Rule |
| Feb 1, 1998 | Mar 2, 1998 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 2, 1998 | Total Coliform Rule |
| Feb 1, 1998 | Mar 2, 1998 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 2, 1998 | Total Coliform Rule |
| Jul 1, 1989 | Jun 30, 1993 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Jun 30, 1993 | Radionuclides and Revised Rad Rule |
| Jul 1, 1989 | Jun 30, 1993 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Jun 30, 1993 | Radionuclides and Revised Rad Rule |
| Jul 1, 1989 | Jun 30, 1993 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Jun 30, 1993 | Radionuclides and Revised Rad Rule |
| Jul 1, 1989 | Jun 30, 1993 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Jun 30, 1993 | Radionuclides and Revised Rad Rule |
| Jul 1, 1989 | Jun 30, 1993 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Jun 30, 1993 | Radionuclides and Revised Rad Rule |
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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.