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Tap water quality report

Columbia, TN

EPA monitoring detected 12 contaminants across the 2 water suppliers serving Columbia. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
109,105
people served
12
contaminants found
Tennessee rankings Lead in Tennessee PFAS in Tennessee

What was found in Columbia's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
631 µg/L 6.3%
of the EPA limit 10000 µg/L
Main supplier: COLUMBIA POWER AND WATER SYSTEMS · 84,617 people · 2019
1/2 SYR4
TTHM
67.375 µg/L 84%
of the EPA limit 80 µg/L
Main supplier: COLUMBIA POWER AND WATER SYSTEMS · 84,617 people · 2019
Highest in the city: 79.26 µg/L — MAURY CO WATER SYSTEM · 24,488 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
49.135 µg/L 82%
of the EPA limit 60 µg/L
Main supplier: COLUMBIA POWER AND WATER SYSTEMS · 84,617 people · 2019
Highest in the city: 57.86 µg/L — MAURY CO WATER SYSTEM · 24,488 people · 2019
2/2 SYR4
Barium
22.93 µg/L 1.1%
of the EPA limit 2000 µg/L
Main supplier: COLUMBIA POWER AND WATER SYSTEMS · 84,617 people · 2017
1/2 SYR4
Atrazine
1.4 µg/L 47%
of the EPA limit 3 µg/L
Main supplier: COLUMBIA POWER AND WATER SYSTEMS · 84,617 people · 2019
1/2 SYR4
PFBS
0.0072 µg/L
No EPA limit set
Highest in the city: MAURY CO WATER SYSTEM · 24,488 people · 2024
1/2 UCMR-5
PFOA
0.0071 µg/L
No EPA limit set
Highest in the city: MAURY CO WATER SYSTEM · 24,488 people · 2024
1/2 UCMR-5
Pfhxa
0.0032 µg/L
No EPA limit set
Main supplier: COLUMBIA POWER AND WATER SYSTEMS · 84,617 people · 2024
Highest in the city: 0.0060 µg/L — MAURY CO WATER SYSTEM · 24,488 people · 2024
2/2 UCMR-5
Pfpea
0.0058 µg/L
No EPA limit set
Highest in the city: MAURY CO WATER SYSTEM · 24,488 people · 2024
1/2 UCMR-5
PFOS
0.0041 µg/L
No EPA limit set
Highest in the city: MAURY CO WATER SYSTEM · 24,488 people · 2024
1/2 UCMR-5
Pfhpa
0.0038 µg/L
No EPA limit set
Highest in the city: MAURY CO WATER SYSTEM · 24,488 people · 2024
1/2 UCMR-5
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: COLUMBIA POWER AND WATER SYSTEMS · 84,617 people · 2025
2/2 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Columbia

SupplierPopulation served
COLUMBIA POWER AND WATER SYSTEMS 84,617
MAURY CO WATER SYSTEM 24,488

Frequently asked questions about Columbia tap water

Is Columbia tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Columbia. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Columbia?

2 public water suppliers report drinking-water monitoring for Columbia, Tennessee to the EPA. Each is listed above with its population served.

What contaminants are in Columbia's water?

The contaminants EPA monitoring detected in Columbia include Nitrate, TTHM, Total Haloacetic Acids (HAA5), Barium, Atrazine. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.