Drinking water quality · 2024
· Verified
· PWSID MD0030202
What's in Chapel Hill Water System, MD tap water
Only 6 of 27 core regulated contaminants were reported for Chapel Hill Water System, MD. What was measured is not clean — but most of the picture is missing.
- !1 contaminant at or above a federal limit — worst is Chlorine at 1.5x
- !1 open monitoring or reporting violation
- !1 contaminant within 20% of a limit
- !6 of 27 core regulated contaminants reported — 21 never appear in this report
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −19 contaminants at or above a federal limit
- −4 contaminants within 20% of a limit
- −0 open health-based violations
- −3 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −20 core regulated contaminants never reported (6/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- Chlorine1.5× the federal limit3.54–6 mg/L · limit 4 mg/L
Effective and necessary, but high residual levels can cause taste and odor issues; the EPA caps the residual disinfectant level.
Higher than 95% of MD systems that report it · higher than 95% of U.S. systems
- Nitrate Nitrite92% of the federal limit9.2 mg/L · limit 10 mg/L
higher than 95% of U.S. systems
+5 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Nitrate | 5.62–6.46 mg/L | 10 mg/L |
| Copper | 0.36 mg/L | 1.3 mg/L |
| Gross Alpha | 2.4 pCi/L | 15 pCi/L |
| Lead | 0.002 mg/L | 0.015 mg/L |
| Combined Radium | 0.3 pCi/L | 5 pCi/L |
What this report doesn't tell you
21 of the 27 contaminants a community water system normally reports do not appear anywhere in Chapel Hill Water System, MD's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
Where your water comes from · EPA SDWIS
Chapel Hill Water System, MD's drinking water comes from ground water, drawn from 3 sources.
Source
- CHAPEL HILL 2 BA817250
- CHAPEL HILL1 BA030295
- CHAPEL HILL WELL 3 BA943881
Treatment
- WTP - WELLS 1, 2, 3
Distribution
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based14 violations on record · most recent Apr 2018resolved
- Treatment technique violationHealth-based3 violations on record · most recent Jan 1995resolved
- Monitoring & reporting1 violation on record · most recent Jan 19991 open
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗