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Tap water quality report

Erwin, TN

EPA monitoring detected 10 contaminants across the 1 water supplier serving Erwin. 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.

1
water supplier
12,236
people served
10
contaminants found
Tennessee rankings Lead in Tennessee PFAS in Tennessee

What was found in Erwin'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
3500 µg/L 35%
of the EPA limit 10000 µg/L
Main supplier: ERWIN UTILITIES AUTHORITY · 12,236 people · 2019
1/1 SYR4
Lithium
51.1 µg/L
No EPA limit set
Main supplier: ERWIN UTILITIES AUTHORITY · 12,236 people · 2024
1/1 UCMR-5
TTHM
15.4 µg/L 19%
of the EPA limit 80 µg/L
Main supplier: ERWIN UTILITIES AUTHORITY · 12,236 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
6.004 µg/L 10%
of the EPA limit 60 µg/L
Main supplier: ERWIN UTILITIES AUTHORITY · 12,236 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
2.355 pCi/L 16%
of the EPA limit 15 pCi/L
Main supplier: ERWIN UTILITIES AUTHORITY · 12,236 people · 2015
1/1 SYR4
PFBS
0.0075 µg/L
No EPA limit set
Main supplier: ERWIN UTILITIES AUTHORITY · 12,236 people · 2024
1/1 UCMR-5
PFOS
0.0067 µg/L
No EPA limit set
Main supplier: ERWIN UTILITIES AUTHORITY · 12,236 people · 2024
1/1 UCMR-5
PFOA
0.0041 µg/L
No EPA limit set
Main supplier: ERWIN UTILITIES AUTHORITY · 12,236 people · 2024
1/1 UCMR-5
PFHXS
0.0036 µg/L
No EPA limit set
Main supplier: ERWIN UTILITIES AUTHORITY · 12,236 people · 2024
1/1 UCMR-5
Lead
0.00060 mg/L 4%
of the EPA limit 0.0150 mg/L
Main supplier: ERWIN UTILITIES AUTHORITY · 12,236 people · 2025
1/1 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 Erwin

SupplierPopulation served
ERWIN UTILITIES AUTHORITY 12,236

Frequently asked questions about Erwin tap water

Is Erwin tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Erwin. 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 Erwin?

1 public water supplier report drinking-water monitoring for Erwin, Tennessee to the EPA. Each is listed above with its population served.

What contaminants are in Erwin's water?

The contaminants EPA monitoring detected in Erwin include Nitrate, Lithium, TTHM, Total Haloacetic Acids (HAA5), Gross Alpha, Excl. Radon And U. 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.