Drinking water quality · 2024
· Verified
What's in Columbia, MO tap water
22 contaminants were measured in the Columbia, MO water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 22
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- MO
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 ↗
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 41 ug/LRunning annual avgSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 11 ug/LRunning annual avgSystem-wide | None set | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 3.25 ug/L90th percentile90th Percentile: 90% of your water utility levels were less than | None set | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.13 mg/L90th percentile90th Percentile: 90% of your water utility levels were less than | 1.3 mg/LAction level | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.138 mg/LMaximumTest Result | 2 mg/LMCL | Within the limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 40.6 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| IronA naturally occurring metal common in groundwater. | 0.172 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| LithiumA naturally occurring element found in some groundwater. | 21.4 ug/LMaximumSystem-wide | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 20.7 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| ManganeseA naturally occurring metal from soil and rock. | 0.00842 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| NickelA metal from natural deposits and industrial discharge. | 0.00165 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 4.41 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 35.2 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| ZincA naturally occurring metal that can also enter water from corroding pipes. | 0.00181 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.7 mg/LMaximumTest Result | 4 mg/LMCL | Within the limit |
| BromideA naturally occurring salt found in source water. | 0.0688 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| ChlorideA naturally occurring salt compound. | 31.5 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 96.5 mg/LRangeSystem-wide | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 137 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 187 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 8.22Highest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 329 mg/LHighest single sampleYour Water System Highest Sampled | None set | Detected — no federal limit |
People also ask about Columbia, MO's water
+Is Columbia, MO tap water safe to drink in 2024?
Every one of the 22 contaminants measured in Columbia, MO's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Columbia, MO tap water?
22 contaminants were measured in Columbia, MO's 2024 Consumer Confidence Report, spanning metals, inorganic chemicals, and physical & aggregate. 3 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Columbia, MO's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Columbia, MO's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.