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 | Dec 3, 2025 |
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 (50)
This water system has 50 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 18, 2021 | Lead and Copper Rule |
| Jan 1, 2018 | Dec 31, 2020 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2020 | Inorganic Chemicals |
| Jan 1, 2018 | Dec 31, 2020 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2020 | Inorganic Chemicals |
| Jan 1, 2018 | Dec 31, 2020 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2020 | Inorganic Chemicals |
| Jan 1, 2018 | Dec 31, 2020 | Fluoride | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2020 | Inorganic Chemicals |
| Jan 1, 2015 | Jul 31, 2017 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jul 31, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2015 | Jul 31, 2017 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jul 31, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2015 | Jul 31, 2017 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jul 31, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2015 | Jul 31, 2017 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jul 31, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2015 | Jul 31, 2017 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jul 31, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2015 | Jul 31, 2017 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jul 31, 2017 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2012 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 12, 2012 | Consumer Confidence Rule |
| Jan 1, 2009 | Jan 31, 2009 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jan 31, 2009 | Total Coliform Rule |
| Jan 1, 2009 | Jan 31, 2009 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jan 31, 2009 | Total Coliform Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Dec 1, 2008 | Dec 31, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2008 | Total Coliform Rule |
| Nov 1, 2008 | Nov 30, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2008 | Total Coliform Rule |
| Nov 1, 2008 | Nov 30, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2008 | Total Coliform Rule |
| Oct 1, 2008 | Oct 31, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2008 | Total Coliform Rule |
| Oct 1, 2008 | Oct 31, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2008 | Total Coliform Rule |
| Oct 1, 2008 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jun 11, 2009 | Consumer Confidence Rule |
| Sep 1, 2008 | Sep 30, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2008 | Total Coliform Rule |
| Jul 1, 2008 | Jul 31, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2008 | Total Coliform Rule |
| Jul 1, 2008 | Jul 31, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2008 | Total Coliform Rule |
| May 1, 2008 | May 31, 2008 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | May 31, 2008 | Total Coliform Rule |
| Jan 1, 2008 | Dec 31, 2008 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2008 | Nitrate Rule |
| Jan 1, 2008 | Dec 31, 2008 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2008 | Nitrate Rule |
| Nov 1, 2007 | Nov 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2007 | Total Coliform Rule |
| Nov 1, 2007 | Nov 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2007 | Total Coliform Rule |
| Oct 1, 2007 | Oct 31, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2007 | Total Coliform Rule |
| Oct 1, 2007 | Oct 31, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2007 | Total Coliform Rule |
| Oct 1, 2007 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 13, 2009 | Lead and Copper Rule |
| Oct 1, 2007 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 13, 2009 | Lead and Copper Rule |
| Sep 1, 2007 | Sep 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2007 | Total Coliform Rule |
| Sep 1, 2007 | Sep 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2007 | Total Coliform Rule |
| Sep 1, 2007 | Sep 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2007 | Total Coliform Rule |
| Aug 1, 2007 | Aug 31, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2007 | Total Coliform Rule |
| May 1, 2007 | May 31, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | May 31, 2007 | Total Coliform Rule |
| Apr 1, 2007 | Apr 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 25, 2007 | Total Coliform Rule |
| May 1, 2004 | May 31, 2004 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | May 31, 2004 | Total Coliform Rule |
| Jan 1, 2004 | Dec 31, 2004 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2004 | Nitrate Rule |
| Jul 1, 1994 | Nov 1, 1994 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 1, 1994 | Lead and Copper Rule |
| Jul 1, 1994 | Nov 1, 1994 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 1, 1994 | Lead and Copper Rule |
| Jul 1, 1994 | Nov 1, 1994 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 1, 1994 | Lead and Copper Rule |
| Jul 1, 1988 | Sep 30, 1988 | Nitrate | MCL | Yes | No | 12 | 10 mg/L | 10 | Archived | Sep 30, 1988 | Nitrate Rule |
| Apr 1, 1988 | Jun 30, 1988 | Nitrate | MCL | Yes | No | 11 | 10 mg/L | 10 | Archived | Jun 30, 1988 | Nitrate Rule |
| Jan 1, 1988 | Mar 31, 1988 | Nitrate | MCL | Yes | No | 11 | 10 mg/L | 10 | Archived | Mar 31, 1988 | Nitrate Rule |
| Dec 3, 1987 | Jan 2, 1988 | Nitrate | MCL | Yes | No | 10.6 | 10 mg/L | 10 | Archived | Jan 2, 1988 | Nitrate Rule |
| — | — | — | No | No | — | — | — | — | — | — |
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.