KEYSTONE WATER SUPPLY
Iowa — Community Water System — PWSID: IA0640030
System Information
| PWSID | IA0640030 |
| System Name | KEYSTONE 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 | KEYSTONE |
| ZIP Code | 52249 |
| Address | ATTN WATER SUPT |
| Organization | KEYSTONE WATER SUPPLY |
| Phone | 319-202-4956 |
Population & Service
| Population Served | 599 |
| Service Connections | 280 |
Drinking Water Violations (141)
This water system has 141 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, 2021 | May 31, 2021 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | May 31, 2021 | Ground Water Rule |
| May 1, 2021 | May 31, 2021 | Groundwater Rule | TT | Yes | No | — | — | — | Resolved | May 31, 2021 | Ground Water Rule |
| Apr 1, 2021 | Apr 30, 2021 | Nitrite | MCL | Yes | No | 1.15 MG/L | 1 mg/L | — | Resolved | Apr 30, 2021 | Nitrate Rule |
| Apr 1, 2021 | Apr 30, 2021 | Nitrite | MCL | Yes | No | 1.15 MG/L | 1 mg/L | — | Resolved | Apr 30, 2021 | Nitrate Rule |
| Apr 1, 2021 | Apr 30, 2021 | Nitrite | MCL | Yes | No | 1.15 MG/L | 1 mg/L | — | Resolved | Apr 30, 2021 | Nitrate Rule |
| Apr 1, 2021 | Apr 30, 2021 | Nitrite | MCL | Yes | No | 1.15 MG/L | 1 mg/L | — | Resolved | Apr 30, 2021 | Nitrate Rule |
| Nov 1, 2020 | Nov 30, 2020 | Nitrite | MCL | Yes | No | 1.26 MG/L | 1 mg/L | — | Resolved | Nov 30, 2020 | Nitrate Rule |
| Nov 1, 2020 | Nov 30, 2020 | Nitrite | MCL | Yes | No | 1.26 MG/L | 1 mg/L | — | Resolved | Nov 30, 2020 | Nitrate Rule |
| Nov 1, 2020 | Nov 30, 2020 | Nitrite | MCL | Yes | No | 1.26 MG/L | 1 mg/L | — | Resolved | Nov 30, 2020 | Nitrate Rule |
| Nov 1, 2020 | Nov 30, 2020 | Nitrite | MCL | Yes | No | 1.26 MG/L | 1 mg/L | — | Resolved | Nov 30, 2020 | Nitrate Rule |
| Dec 1, 2018 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 28, 2019 | Lead and Copper Rule |
| Dec 1, 2018 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 28, 2019 | Lead and Copper Rule |
| Sep 1, 2018 | Sep 30, 2018 | Nitrite | MCL | Yes | No | 1.83 MG/L | 1 mg/L | — | Resolved | Sep 30, 2018 | Nitrate Rule |
| Sep 1, 2018 | Sep 30, 2018 | Nitrite | MCL | Yes | No | 1.83 MG/L | 1 mg/L | — | Resolved | Sep 30, 2018 | Nitrate Rule |
| Sep 1, 2018 | Sep 30, 2018 | Nitrite | MCL | Yes | No | 1.83 MG/L | 1 mg/L | — | Resolved | Sep 30, 2018 | Nitrate Rule |
| Sep 1, 2018 | Sep 30, 2018 | Nitrite | MCL | Yes | No | 1.83 MG/L | 1 mg/L | — | Resolved | Sep 30, 2018 | Nitrate Rule |
| Jul 1, 2018 | Jun 30, 2019 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | Nitrate Rule |
| Jul 1, 2018 | Jun 30, 2019 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | Nitrate Rule |
| Jul 1, 2018 | Jun 30, 2019 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | Nitrate Rule |
| Jul 1, 2018 | Jun 30, 2019 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | Nitrate Rule |
| Nov 1, 2015 | Nov 30, 2015 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 30, 2015 | Nitrate Rule |
| Nov 1, 2015 | Nov 30, 2015 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 30, 2015 | Nitrate Rule |
| Nov 1, 2015 | Nov 30, 2015 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 30, 2015 | Nitrate Rule |
| Nov 1, 2015 | Nov 30, 2015 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 30, 2015 | Nitrate Rule |
| Sep 1, 2013 | Sep 30, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 2013 | Nitrate Rule |
| Sep 1, 2013 | Sep 30, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 2013 | Nitrate Rule |
| Sep 1, 2013 | Sep 30, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 2013 | Nitrate Rule |
| Sep 1, 2013 | Sep 30, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 2013 | Nitrate Rule |
| Sep 1, 2013 | Sep 30, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 2013 | Nitrate Rule |
| Aug 1, 2013 | Aug 31, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2013 | Total Coliform Rule |
| Aug 1, 2013 | Aug 31, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2013 | Total Coliform Rule |
| Aug 1, 2013 | Aug 31, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2013 | Total Coliform Rule |
| Aug 1, 2013 | Aug 31, 2013 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2013 | Total Coliform Rule |
| Aug 1, 2013 | Aug 31, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | Nitrate Rule |
| Aug 1, 2013 | Aug 31, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | Nitrate Rule |
| Aug 1, 2013 | Aug 31, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | Nitrate Rule |
| Aug 1, 2013 | Aug 31, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | Nitrate Rule |
| Aug 1, 2013 | Aug 31, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | Nitrate Rule |
| Aug 1, 2013 | Aug 31, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | Nitrate Rule |
| Aug 1, 2013 | Aug 31, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | Nitrate Rule |
| Aug 1, 2013 | Aug 31, 2013 | Nitrite | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | Nitrate Rule |
| Jul 20, 2013 | — | Public Notice | Other | No | No | — | — | — | Resolved | Jul 21, 2014 | Public Notice Rule and Revised PN Rule |
| Jul 20, 2013 | — | Public Notice | Other | No | No | — | — | — | Resolved | Jul 21, 2014 | Public Notice Rule and Revised PN Rule |
| Jul 20, 2013 | — | Public Notice | Other | No | No | — | — | — | Resolved | Jul 21, 2014 | Public Notice Rule and Revised PN Rule |
| Jul 20, 2013 | — | Public Notice | Other | No | No | — | — | — | Resolved | Jul 21, 2014 | Public Notice Rule and Revised PN Rule |
| Apr 1, 2013 | Mar 31, 2014 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2014 | Nitrate Rule |
| Apr 1, 2013 | Mar 31, 2014 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2014 | Nitrate Rule |
| Apr 1, 2013 | Mar 31, 2014 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2014 | Nitrate Rule |
| Apr 1, 2013 | Jun 30, 2013 | Toluene | MR | No | Yes | — | 1 mg/L | — | Resolved | Jun 30, 2013 | Volatile Organic Chemicals |
| Apr 1, 2013 | Jun 30, 2013 | Toluene | MR | No | Yes | — | 1 mg/L | — | Resolved | Jun 30, 2013 | Volatile Organic Chemicals |
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.