ROCK ISLAND WSC
Texas - Community Water System - PWSID: TX0450015
System Information
| PWSID | TX0450015 |
| System Name | ROCK ISLAND WSC |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 06 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 14, 1980 |
| Last Reported | Jun 26, 2026 |
Location & Contact
| State | Texas |
| City | ROCK ISLAND |
| ZIP Code | 77470-0144 |
| Address | PO BOX 144 |
| Organization | HARRIS, CALVIN |
| Phone | - |
Population & Service
| Population Served | 230 |
| Service Connections | 129 |
Drinking Water Violations (80)
This water system has 80 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec 30, 2025 | - | MR | No | No | - | TT | - | Resolved | Feb 24, 2026 | - | |
| Dec 30, 2025 | - | MR | No | No | - | TT | - | Resolved | Feb 24, 2026 | - | |
| May 1, 2023 | May 31, 2023 | MON | No | Yes | - | - | - | Resolved | May 31, 2023 | - | |
| May 1, 2023 | May 31, 2023 | MON | No | Yes | - | - | - | Resolved | May 31, 2023 | - | |
| May 1, 2023 | May 31, 2023 | MON | No | Yes | - | - | - | Resolved | May 31, 2023 | - | |
| May 1, 2023 | May 31, 2023 | MON | No | Yes | - | - | - | Resolved | May 31, 2023 | - | |
| Dec 30, 2019 | - | MR | No | No | - | TT | - | Resolved | Apr 11, 2020 | - | |
| Dec 30, 2019 | - | MR | No | No | - | TT | - | Resolved | Apr 11, 2020 | - | |
| Oct 1, 2017 | Dec 31, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2017 | - | |
| Oct 1, 2017 | Dec 31, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2017 | - | |
| Oct 1, 2017 | Dec 31, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2017 | - | |
| Oct 1, 2017 | Dec 31, 2017 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2017 | - | |
| Oct 1, 2015 | - | MR | No | No | - | TT | - | Resolved | Oct 4, 2016 | - | |
| Oct 1, 2015 | - | MR | No | No | - | TT | - | Resolved | Oct 4, 2016 | - | |
| Oct 1, 2015 | - | MR | No | No | - | TT | - | Resolved | Oct 4, 2016 | - | |
| Oct 1, 2015 | - | MR | No | No | - | TT | - | Resolved | Oct 4, 2016 | - | |
| Jul 1, 2015 | - | Other | No | No | - | - | - | Resolved | Aug 16, 2016 | - | |
| Jul 1, 2015 | Sep 30, 2015 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2015 | - | |
| Jul 1, 2015 | Sep 30, 2015 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2015 | - | |
| Jul 1, 2015 | Sep 30, 2015 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2015 | - | |
| Jul 1, 2015 | Sep 30, 2015 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2015 | - | |
| Jul 1, 2015 | - | Other | No | No | - | - | - | Resolved | Aug 16, 2016 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2012 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2012 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2012 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2012 | - | |
| Jul 1, 2012 | - | Other | No | No | - | - | - | Resolved | Nov 21, 2013 | - | |
| Jul 1, 2012 | - | Other | No | No | - | - | - | Resolved | Nov 21, 2013 | - | |
| Aug 1, 2011 | Aug 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2011 | - | |
| Aug 1, 2011 | Aug 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2011 | - | |
| Aug 1, 2011 | Aug 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2011 | - | |
| Aug 1, 2011 | Aug 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2011 | - | |
| Jul 1, 2011 | Jul 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2011 | - | |
| Jul 1, 2011 | Jul 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2011 | - | |
| Jul 1, 2011 | Jul 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2011 | - | |
| Jul 1, 2011 | Jul 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2011 | - | |
| Apr 27, 2011 | - | Other | No | No | - | - | - | Resolved | Jul 1, 2011 | - | |
| Apr 27, 2011 | - | Other | No | No | - | - | - | Resolved | Jul 1, 2011 | - | |
| Dec 1, 2010 | Dec 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2010 | - | |
| Dec 1, 2010 | Dec 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2010 | - | |
| Dec 1, 2010 | Dec 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2010 | - | |
| Dec 1, 2010 | Dec 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2010 | - | |
| Nov 1, 2010 | - | MR | No | Yes | - | - | - | Resolved | Aug 31, 2011 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Nov 1, 2010 | - | MR | No | Yes | - | - | - | Resolved | Aug 31, 2011 | - | |
| Nov 1, 2010 | - | MR | No | Yes | - | - | - | Resolved | Aug 31, 2011 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2010 | - |
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.