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Tap water quality report

First U.D. of Knox County

EPA monitoring tested this supplier for 64 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

64
contaminants tested
8
detected
115,531
people served
7
health-based violations
Tennessee rankingsLead in TennesseePFAS in Tennessee
Water source
Surface water
Ownership
Local government
Counties served
Knox

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

7
health-based violations
42
violations on file
1
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2008-07-01 → 2008-07-31
TT Health-based Resolved 2008-07-01 → 2008-07-31
TT Health-based Resolved 2008-07-01 → 2008-07-31
TT Health-based Resolved 2008-07-01 → 2008-07-31
TT Health-based Archived 2002-02-01 → 2002-02-28
TT Health-based Archived 2002-02-01 → 2002-02-28
TT Health-based Archived 2002-02-01 → 2002-02-28
Other Monitoring Unaddressed 2018-09-01
Other Monitoring Resolved 2016-07-01
Other Monitoring Resolved 2016-07-01

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0064 µg/L 3/4 2024
Pfhxa 0.0030 µg/L 1/4 2024

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
TTHM
66.175 µg/L 83%
of the EPA limit 80 µg/L
worst single sample: 76.5 µg/L
196/196 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
38.45 µg/L 64%
of the EPA limit 60 µg/L
worst single sample: 43.9 µg/L
196/196 SYR4 2014–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Nitrate
868 µg/L 8.7%
of the EPA limit 10000 µg/L
 12/12 SYR4 2014–2019
2,4-D
0.4000 µg/L 0.6%
of the EPA limit 70 µg/L
 1/6 SYR4 2015–2019
Gross Alpha, Excl. Radon And U
1.41 pCi/L 9.4%
of the EPA limit 15 pCi/L
 1/1 SYR4 2016
56 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAtrazineBenzeneChlorobenzeneCarbon TetrachlorideDichloromethaneDalaponDinosebEthylbenzeneHfpo-DaNetfosaaNfdhaNmefosaaPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
GILES, BRUCE
Phone
865-966-9741
Email
[email protected]

Frequently asked questions about First U.D. of Knox County

Is First U.D. of Knox County tap water safe to drink?

EPA monitoring detected 8 contaminants in First U.D. of Knox County's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in First U.D. of Knox County's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Lead, Nitrate, PFBS, and others. The full list with the level and data source for each is above.

How many people does First U.D. of Knox County serve?

First U.D. of Knox County reports serving 115,531 people in Tennessee, per its EPA record.

Has First U.D. of Knox County had any water quality violations?

The EPA has 42 violations on file for First U.D. of Knox County, of which 7 are health-based (a contaminant limit or required treatment was breached) and 1 remain open. The rest are monitoring or reporting failures.

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.