Tap Water Quality Report
Tap water quality in COLUMBIA, Tennessee
Tap water in COLUMBIA, Tennessee receives a grade of C (79/100) from TapWaterSafety.org. It's served by COLUMBIA POWER AND WATER SYSTEMS. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in COLUMBIA's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving COLUMBIA.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 35.9 ppb, 598x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 30.0 ppb, 300x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 36.2 ppb, 242x above the EWG health guideline of 0.15 ppb.
EPA compliance record
Official U.S. EPA records for COLUMBIA POWER AND WATER SYSTEMS (system ID TN0000128) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for COLUMBIA
Filters matched to the specific contaminants in COLUMBIA's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in COLUMBIA's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
35.9 ppb | 0.06 | — | — | — | — | — | 598× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
30.0 ppb | 0.1 | 60.0 | 60 | — | — | — | 300× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
36.2 ppb | 0.15 | 80.0 | 100 | — | — | — | 242× over |
| Trichloroacetic acid Disinfection byproduct |
13.1 ppb | 0.1 | — | — | — | — | — | 131× over |
| Bromodichloromethane Disinfection byproduct |
5.08 ppb | 0.06 | — | — | — | — | — | 85× over |
| Chloroform Disinfection byproduct |
29.8 ppb | 0.4 | — | — | — | — | — | 75× over |
| Dichloroacetic acid Disinfection byproduct |
14.5 ppb | 0.2 | — | — | — | — | — | 73× over |
| Chromium (hexavalent) Heavy metal |
0.0988 ppb | 0.02 | — | — | — | — | — | 4.9× over |
| Nitrate Inorganic |
0.429 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.1× over |
| Dibromochloromethane Disinfection byproduct |
0.303 ppb | 0.1 | — | — | — | — | — | 3.0× over |
| Chlorate Disinfection byproduct |
160.5 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Atrazine Pesticide/Herbicide |
0.0228 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.055 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
2.39 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
21.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| 2,4-D Pesticide/Herbicide |
0.577 ppb | 20.0 | 70.0 | — | — | — | — | Below guideline |
| Vanadium Other |
0.588 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
2.74 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.8 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.088 ppb | 1500.0 | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from COLUMBIA POWER AND WATER SYSTEMS.