Drinking water quality · 2024
· Verified
· PWSID MA3165000
What's in Malden, MA tap water
Only 9 of 27 core regulated contaminants were reported for Malden, MA. What was measured is not clean — but most of the picture is missing.
- !1 contaminant at or above a federal limit — worst is Lead at 1.3x
- !3 open monitoring or reporting violations
- !9 of 27 core regulated contaminants reported — 18 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.
- −16 contaminants at or above a federal limit
- −0 contaminants within 20% of a limit
- −0 open health-based violations
- −9 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −16 core regulated contaminants never reported (9/27)
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
- Lead1.3× the federal limit0.0192 mg/L · limit 0.015 mg/L
There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.
Higher than 95% of MA systems that report it · higher than 95% of U.S. systems
+8 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Chloramine | 1.94 mg/L | 4 mg/L |
| HAA5 | 22.9 ug/L | 60 ug/L |
| TTHM | 26.3 ug/L | 80 ug/L |
| Fluoride | 0.7 mg/L | 4 mg/L |
| Combined Radium | 0.82 pCi/L | 5 pCi/L |
| Copper | 93 ug/L | 1300 ug/L |
| Nitrate | 0.62 mg/L | 10 mg/L |
| Barium | 0.008 mg/L | 2 mg/L |
What this report doesn't tell you
18 of the 27 contaminants a community water system normally reports do not appear anywhere in Malden, MA'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
Malden, MA buys its drinking water from MWRA.
Source
Treatment
Distribution
Also buys water from MWRA.
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-based12 violations on record · most recent Jul 1997resolved
- Treatment technique violationHealth-based8 violations on record · most recent Mar 2016resolved
- Monitoring & reporting2 violations on record · most recent Jul 20192 open
- Other1 violation on record · most recent Jun 20221 open
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗