Drinking water quality · 2024
· Verified
· PWSID CO0101170
What's in Westminster, CO tap water
Only 0 of 27 core regulated contaminants were reported for Westminster, CO. What was measured is clean — but most of the picture is missing.
- !0 of 27 core regulated contaminants reported — 27 never appear in this report
- ✓Nothing over a federal limit
- ✓No open federal violations
+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.
- −0 contaminants at or above a federal limit
- −0 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −30 core regulated contaminants never reported (0/27)
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 →+7 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Ammonia | 0.36–0.63 mg/L | — |
| Sodium | 27–28 mg/L | — |
| Alkalinity | 50–64 mg/L | — |
| Hardness | 109–139 mg/L | — |
| pH | 8.4–8.8 | — |
| Specific Conductance | 344–451 | — |
| Total Dissolved Solids | 209–263 mg/L | — |
What this report doesn't tell you
27 of the 27 contaminants a community water system normally reports do not appear anywhere in Westminster, CO'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
Westminster, CO's drinking water comes from surface water, drawn from 2 sources.
Source
- STANDLEY LAKE
- FHL BYPASS
Treatment
- NORTHWEST WATER TREATMENT PLANT
- SEMPER WTP
Distribution
Also buys water from THORNTON CITY OF, ARVADA CITY OF, and 4 more.
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.