Glen Burnie-Broadneck
Millersville, Maryland · PWSID: MD0020017
Millersville Water Quality Summary
Glen Burnie-Broadneck supplies drinking water to about 290,606 people in Millersville, Maryland, and draws from ground water (wells or aquifers), which is naturally filtered but can carry minerals and contaminants from the surrounding geology. On the IsWaterSafe scale it earns a poor Water Safety Score of 64 out of 100 (Grade D), a composite of its EPA SDWIS violation and contaminant record.
EPA records show 1 health-based violation for this system. A health-based violation means a contaminant exceeded its legal EPA limit, the most serious category in the Safe Drinking Water Act. The system has 12 enforcement actions on file in response.
Across the 11 substances sampled, none exceeded its EPA limit. Combined Filter Effluent sits highest relative to its ceiling, detected at 0.5 NTU against an MCL of 1 NTU (sampled October 2021) — within the legal limit.
The most recent documented episode is a health-based violation involving Combined Filter Effluent, beginning October 2021 and marked resolved October 2022.
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Detected Contaminants
| Contaminant | Detected Level | MCL (Limit) | Status | Sample Date |
|---|---|---|---|---|
| Combined Filter Effluent | 0.5 NTU | 1 NTU | Within Limit | Oct 1, 2021 |
| Barium | 1000 ppb | 2000 ppb | Within Limit | Jan 1, 2020 |
| Cadmium | 2.5 ppb | 5 ppb | Within Limit | Jan 1, 2020 |
| Chromium | 50 ppb | 100 ppb | Within Limit | Jan 1, 2020 |
| Mercury | 1 ppb | 2 ppb | Within Limit | Jan 1, 2020 |
| Antimony | 3 ppb | 6 ppb | Within Limit | Jan 1, 2020 |
| Beryllium | 2 ppb | 4 ppb | Within Limit | Jan 1, 2020 |
| Thallium | 1 ppb | 2 ppb | Within Limit | Jan 1, 2020 |
| Selenium | 25 ppb | 50 ppb | Within Limit | Jan 1, 2020 |
| Nitrate | 5 ppm | 10 ppm | Within Limit | Jan 1, 2022 |
| Fluoride | 2000 ppb | 4000 ppb | Within Limit | Jan 1, 2020 |
Violation History
Frequently Asked Questions
Glen Burnie-Broadneck has a Water Safety Score of D (64/100). The system serves 290,606 people and has 1 health violation on record. Check the contaminant table above for specific detected substances.
Glen Burnie-Broadneck has 1 contaminant exceedance above EPA health guidelines. See the full contaminant detection table above for all tested substances and their levels relative to legal limits and health guidelines.
The Water Safety Score (0-100, grades A through F) is based on contaminant levels relative to legal limits, health guideline exceedances, violation history, and enforcement actions. Higher scores indicate fewer concerns.
If your water system has violations, request the Consumer Confidence Report from your utility, consider getting an independent water test from a certified lab, and look into certified water filters for specific contaminants of concern. For lead, run cold water for 30 seconds before drinking.
Water quality data sourced from EPA's Safe Drinking Water Information System (SDWIS). Safety scores are calculated based on contaminant levels, violations, and enforcement history. This is not a substitute for your utility's official Consumer Confidence Report.
Source: EPA Ground Water and Drinking Water, 2026.