Drinking water quality · 2024
· Verified
· PWSID MO3069001
What's in Columbia, MO tap water
Only 6 of 27 core regulated contaminants were reported for Columbia, MO. What was measured is clean — but most of the picture is missing.
- !6 of 27 core regulated contaminants reported — 21 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
- −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 →+22 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| TTHM | 41 ug/L | 80 ug/L |
| Lead | 3.25 ug/L | 15 ug/L |
| HAA5 | 11 ug/L | 60 ug/L |
| Fluoride | 0.7 mg/L | 4 mg/L |
| Copper | 0.13 mg/L | 1.3 mg/L |
| Barium | 0.138 mg/L | 2 mg/L |
| Bromide | 0.0688 mg/L | — |
| Chloride | 31.5 mg/L | — |
| Sulfate | 96.5 mg/L | — |
| Calcium | 40.6 mg/L | — |
| Iron | 0.172 mg/L | — |
| Lithium | 21.4 ug/L | — |
| Magnesium | 20.7 mg/L | — |
| Manganese | 0.00842 mg/L | — |
| Nickel | 0.00165 mg/L | — |
| Potassium | 4.41 mg/L | — |
| Sodium | 35.2 mg/L | — |
| Zinc | 0.00181 mg/L | — |
| Alkalinity | 137 mg/L | — |
| Hardness | 187 mg/L | — |
| pH | 8.22 | — |
| Total Dissolved Solids | 329 mg/L | — |
What this report doesn't tell you
21 of the 27 contaminants a community water system normally reports do not appear anywhere in Columbia, MO'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
Columbia, MO's drinking water comes from ground water, drawn from 5 sources.
Source
- WELL # 2 EAST WELL
- NORTH WELL
- SOUTH WELL
- SOUTHWEST WELL
- + 1 more
Treatment
- EAST WELL- WILLIAMS ST & ROLLINS RD
- NORTH WELL - 1108 PAQUIN ST
- SOUTH WELL - 1004 STADIUM BLVD E
- + 2 more
Distribution
Also buys water from CITY OF COLUMBIA UTILITIES.
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-based5 violations on record · most recent Aug 1995resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗