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 | Mar 17, 2026 |
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 (142)
This water system has 142 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 | TT | Yes | No | — | — | — | Resolved | May 31, 2021 | — | |
| May 1, 2021 | May 31, 2021 | TT | Yes | No | — | — | — | Resolved | May 31, 2021 | — | |
| Apr 1, 2021 | Apr 30, 2021 | MCL | Yes | No | 1.15 MG/L | 1 mg/L | — | Resolved | Apr 30, 2021 | — | |
| Apr 1, 2021 | Apr 30, 2021 | MCL | Yes | No | 1.15 MG/L | 1 mg/L | — | Resolved | Apr 30, 2021 | — | |
| Apr 1, 2021 | Apr 30, 2021 | MCL | Yes | No | 1.15 MG/L | 1 mg/L | — | Resolved | Apr 30, 2021 | — | |
| Apr 1, 2021 | Apr 30, 2021 | MCL | Yes | No | 1.15 MG/L | 1 mg/L | — | Resolved | Apr 30, 2021 | — | |
| Nov 1, 2020 | Nov 30, 2020 | MCL | Yes | No | 1.26 MG/L | 1 mg/L | — | Resolved | Nov 30, 2020 | — | |
| Nov 1, 2020 | Nov 30, 2020 | MCL | Yes | No | 1.26 MG/L | 1 mg/L | — | Resolved | Nov 30, 2020 | — | |
| Nov 1, 2020 | Nov 30, 2020 | MCL | Yes | No | 1.26 MG/L | 1 mg/L | — | Resolved | Nov 30, 2020 | — | |
| Nov 1, 2020 | Nov 30, 2020 | MCL | Yes | No | 1.26 MG/L | 1 mg/L | — | Resolved | Nov 30, 2020 | — | |
| Dec 1, 2018 | — | MR | No | No | — | TT | — | Resolved | Feb 28, 2019 | — | |
| Dec 1, 2018 | — | MR | No | No | — | TT | — | Resolved | Feb 28, 2019 | — | |
| Sep 1, 2018 | Sep 30, 2018 | MCL | Yes | No | 1.83 MG/L | 1 mg/L | — | Resolved | Sep 30, 2018 | — | |
| Sep 1, 2018 | Sep 30, 2018 | MCL | Yes | No | 1.83 MG/L | 1 mg/L | — | Resolved | Sep 30, 2018 | — | |
| Sep 1, 2018 | Sep 30, 2018 | MCL | Yes | No | 1.83 MG/L | 1 mg/L | — | Resolved | Sep 30, 2018 | — | |
| Sep 1, 2018 | Sep 30, 2018 | MCL | Yes | No | 1.83 MG/L | 1 mg/L | — | Resolved | Sep 30, 2018 | — | |
| Jul 1, 2018 | Jun 30, 2019 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | — | |
| Jul 1, 2018 | Jun 30, 2019 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | — | |
| Jul 1, 2018 | Jun 30, 2019 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | — | |
| Jul 1, 2018 | Jun 30, 2019 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | — | |
| Nov 1, 2015 | Nov 30, 2015 | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 30, 2015 | — | |
| Nov 1, 2015 | Nov 30, 2015 | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 30, 2015 | — | |
| Nov 1, 2015 | Nov 30, 2015 | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 30, 2015 | — | |
| Nov 1, 2015 | Nov 30, 2015 | MR | No | Yes | — | 1 mg/L | — | Resolved | Nov 30, 2015 | — | |
| Sep 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Sep 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Sep 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Sep 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Sep 1, 2013 | Sep 30, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Sep 30, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Aug 31, 2013 | — | |
| Jul 20, 2013 | — | Other | No | No | — | — | — | Resolved | Jul 21, 2014 | — | |
| Jul 20, 2013 | — | Other | No | No | — | — | — | Resolved | Jul 21, 2014 | — | |
| Jul 20, 2013 | — | Other | No | No | — | — | — | Resolved | Jul 21, 2014 | — | |
| Jul 20, 2013 | — | Other | No | No | — | — | — | Resolved | Jul 21, 2014 | — | |
| Apr 1, 2013 | Mar 31, 2014 | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2014 | — | |
| Apr 1, 2013 | Jun 30, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Jun 30, 2013 | — | |
| Apr 1, 2013 | Mar 31, 2014 | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2014 | — | |
| Apr 1, 2013 | Mar 31, 2014 | MR | No | Yes | — | 10 mg/L | — | Resolved | Mar 31, 2014 | — | |
| Apr 1, 2013 | Jun 30, 2013 | MR | No | Yes | — | 1 mg/L | — | Resolved | Jun 30, 2013 | — |
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.