Drinking water quality · 2025
· PWSID MT0001557
What's in Cinnabar the, MT tap water
Only 1 of 27 core regulated contaminants were reported for Cinnabar the, MT. 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 1.0x
- !1 open monitoring or reporting violation
- !1 of 27 core regulated contaminants reported — 26 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.
- −12 contaminants at or above a federal limit
- −0 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
- −28 core regulated contaminants never reported (1/27)
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
- Lead1.0× the federal limit0.015 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 MT systems that report it · higher than 95% of U.S. systems
What this report doesn't tell you
26 of the 27 contaminants a community water system normally reports do not appear anywhere in Cinnabar the, MT'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
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-based10 violations on record · most recent Aug 2015resolved
- Treatment technique violationHealth-based1 violation on record · most recent Dec 2003resolved
- Monitoring & reporting1 violation on record · most recent Mar 20151 open
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗