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Tap water quality report

Dayton Water Dept

EPA monitoring tested this supplier for 71 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
9
detected
25,054
people served
40
health-based violations
Tennessee rankingsLead in TennesseePFAS in Tennessee
Water source
Surface water
Ownership
Local government
Counties served
Rhea

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.

40
health-based violations
143
violations on file
1
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2024-01-01 → 2024-03-31
MCL Health-based Resolved 2024-01-01 → 2024-03-31
MCL Health-based Resolved 2024-01-01 → 2024-03-31
MCL Health-based Resolved 2024-01-01 → 2024-03-31
MCL Health-based Resolved 2024-01-01 → 2024-03-31
MCL Health-based Resolved 2016-04-01 → 2016-06-30
MCL Health-based Resolved 2016-04-01 → 2016-06-30
MCL Health-based Resolved 2016-04-01 → 2016-06-30
MCL Health-based Resolved 2016-04-01 → 2016-06-30
MCL Health-based Resolved 2016-04-01 → 2016-06-30

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
91.31 µg/L 114%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 153 µg/L
100/100 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
62.62 µg/L 104%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 124 µg/L
100/100 SYR4 2014–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
Nitrate
455 µg/L 4.6%
of the EPA limit 10000 µg/L
 10/10 SYR4 2014–2018
Chlorobenzene
1.157 µg/L 1.2%
of the EPA limit 100 µg/L
worst single sample: 1.19 µg/L
7/14 SYR4 2014–2019
Barium
27 µg/L 1.4%
of the EPA limit 2000 µg/L
 1/1 SYR4 2014
Fluoride
840 µg/L 21%
of the EPA limit 4000 µg/L
 1/1 SYR4 2014
Toluene
1.08 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/14 SYR4 2014–2019
Xylenes, Total
0.8480 µg/L 0%
of the EPA limit 10000 µg/L
 1/14 SYR4 2014–2019
62 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBenzeneBeryllium, TotalCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylbenzeneGross Alpha, Excl. Radon And UHfpo-DaMercuryNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
COLVIN, TAMMY
Phone
423-775-8404
Email
[email protected]

Frequently asked questions about Dayton Water Dept

Is Dayton Water Dept tap water safe to drink?

EPA monitoring detected 9 contaminants in Dayton Water Dept'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 Dayton Water Dept's water?

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

How many people does Dayton Water Dept serve?

Dayton Water Dept reports serving 25,054 people in Tennessee, per its EPA record.

Has Dayton Water Dept had any water quality violations?

The EPA has 143 violations on file for Dayton Water Dept, of which 40 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.