JONESTOWN WATER SYSTEM
Maryland - Community Water System - PWSID: MD0050004
System Information
| PWSID | MD0050004 |
| System Name | JONESTOWN WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 03 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 21, 1982 |
| Last Reported | Feb 26, 2026 |
Location & Contact
| State | Maryland |
| City | DENTON |
| ZIP Code | 21629 |
| Address | CAROLINE COUNTY PUBLIC WORKS |
| Organization | BROWN, KEVIN |
| Phone | 410-479-0520 |
Population & Service
| Population Served | 150 |
| Service Connections | 56 |
Drinking Water Violations (174)
This water system has 174 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 2, 2025 | - | RPT | No | No | - | - | - | Resolved | Oct 30, 2025 | - | |
| Oct 1, 2021 | - | MR | No | No | - | TT | - | Resolved | Oct 18, 2021 | - | |
| Jan 1, 2018 | Dec 31, 2020 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2020 | - | |
| Jan 1, 2018 | Dec 31, 2020 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2020 | - | |
| Jan 1, 2018 | Dec 31, 2020 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2020 | - | |
| Jan 1, 2018 | Dec 31, 2020 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2020 | - | |
| Jan 1, 2015 | Jul 31, 2017 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jul 31, 2017 | - | |
| Jan 1, 2015 | Jul 31, 2017 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jul 31, 2017 | - | |
| Jan 1, 2015 | Jul 31, 2017 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jul 31, 2017 | - | |
| Jan 1, 2015 | Jul 31, 2017 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jul 31, 2017 | - | |
| Jan 1, 2015 | Jul 31, 2017 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jul 31, 2017 | - | |
| Jan 1, 2015 | Jul 31, 2017 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jul 31, 2017 | - | |
| Jan 1, 2015 | Jul 31, 2017 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jul 31, 2017 | - | |
| Jan 1, 2015 | Jul 31, 2017 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jul 31, 2017 | - | |
| Jul 1, 2012 | - | Other | No | No | - | - | - | Resolved | Jul 12, 2012 | - | |
| Jul 1, 2012 | - | Other | No | No | - | - | - | Resolved | Jul 12, 2012 | - | |
| Oct 1, 2011 | - | Other | No | No | - | - | - | Resolved | Feb 24, 2012 | - | |
| Oct 1, 2011 | - | Other | No | No | - | - | - | Resolved | Feb 24, 2012 | - | |
| Jul 1, 2011 | - | Other | No | No | - | - | - | Resolved | Jul 13, 2011 | - | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2009 | - | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2009 | - | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2009 | - | |
| Jan 1, 2009 | Jan 31, 2009 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2009 | - | |
| Jan 1, 2009 | Jan 31, 2009 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2009 | - | |
| Jan 1, 2009 | Jan 31, 2009 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2009 | - | |
| Dec 1, 2008 | Dec 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2008 | - | |
| Dec 1, 2008 | Dec 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2008 | - | |
| Dec 1, 2008 | Dec 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2008 | - | |
| Nov 1, 2008 | Nov 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2008 | - | |
| Nov 1, 2008 | Nov 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2008 | - | |
| Nov 1, 2008 | Nov 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2008 | - | |
| Oct 1, 2008 | - | Other | No | No | - | - | - | Resolved | Jun 11, 2009 | - | |
| Oct 1, 2008 | Oct 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2008 | - | |
| Oct 1, 2008 | Oct 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2008 | - | |
| Oct 1, 2008 | Oct 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2008 | - | |
| Sep 1, 2008 | Sep 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2008 | - | |
| Sep 1, 2008 | Sep 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2008 | - | |
| Sep 1, 2008 | Sep 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2008 | - | |
| Aug 1, 2008 | Aug 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2008 | - | |
| Aug 1, 2008 | Aug 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2008 | - | |
| Aug 1, 2008 | Aug 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2008 | - | |
| Jul 1, 2008 | Jul 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2008 | - | |
| Jul 1, 2008 | Jul 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2008 | - | |
| Jul 1, 2008 | - | Other | No | No | - | - | - | Resolved | Jan 13, 2009 | - | |
| Jul 1, 2008 | Jul 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2008 | - | |
| Jun 1, 2008 | Jun 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2008 | - | |
| Jun 1, 2008 | Jun 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2008 | - | |
| Jun 1, 2008 | Jun 30, 2008 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2008 | - | |
| May 1, 2008 | May 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 2008 | - | |
| May 1, 2008 | May 31, 2008 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 2008 | - |
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.