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Tap water quality report

Denton Town of

EPA monitoring tested this supplier for 73 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
19
detected
255
people served
359
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Surface water
Ownership
Local government
Counties served
Fergus

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.

359
health-based violations
433
violations on file
5
still open
ViolationTypeStatusPeriod
TT Health-based Archived 2026-02-01 → 2026-02-28
TT Health-based Archived 2026-02-01 → 2026-02-28
TT Health-based Archived 2026-02-01 → 2026-02-28
TT Health-based Archived 2026-02-01 → 2026-02-28
TT Health-based Archived 2026-01-01 → 2026-01-31
TT Health-based Archived 2026-01-01 → 2026-01-31
TT Health-based Archived 2026-01-01 → 2026-01-31
TT Health-based Archived 2026-01-01 → 2026-01-31
TT Health-based Archived 2025-12-01 → 2025-12-31
TT Health-based Archived 2025-12-01 → 2025-12-31

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
Nitrate-Nitrite
13800 µg/L 138%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 21100 µg/L
96/96 SYR4 2012–2019
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2025
Copper
552.4 µg/L 42%
of the EPA limit 1300 µg/L
worst single sample: 711 µg/L
14/15 SYR4 2013–2019
TTHM
8.235 µg/L 10%
of the EPA limit 80 µg/L
worst single sample: 8.9 µg/L
8/12 SYR4 2013–2019
Bromodichloromethane
2.475 µg/L
No EPA limit set
worst single sample: 2.6 µg/L
6/12 SYR4 2013–2019
Dibromochloromethane
3.225 µg/L
No EPA limit set
worst single sample: 3.4 µg/L
6/12 SYR4 2013–2019
Lead
9.75 µg/L 65%
of the EPA limit 15 µg/L
worst single sample: 11 µg/L
6/15 SYR4 2013–2019
Chloroform
1.385 µg/L
No EPA limit set
worst single sample: 1.4 µg/L
4/12 SYR4 2013–2019
Fluoride
1270 µg/L 32%
of the EPA limit 4000 µg/L
worst single sample: 1300 µg/L
4/4 SYR4 2013–2019
Barium
60 µg/L 3%
of the EPA limit 2000 µg/L
 3/4 SYR4 2013–2019
Bromoform
1.59 µg/L
No EPA limit set
worst single sample: 1.6 µg/L
3/12 SYR4 2013–2019
Combined Radium (-226 And -228)
1.1 pCi/L 22%
of the EPA limit 5 pCi/L
 1/1 SYR4 2014
Combined Uranium
6 µg/L 20%
of the EPA limit 30 µg/L
 1/1 SYR4 2014
Dibromoacetic Acid
0.5600 µg/L
No EPA limit set
 1/5 SYR4 2013–2019
Dichloroacetic Acid
1.4 µg/L
No EPA limit set
 1/5 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
3.3 pCi/L 22%
of the EPA limit 15 pCi/L
 1/1 SYR4 2014
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
 1/4 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
2.6 µg/L 4.3%
of the EPA limit 60 µg/L
 1/5 SYR4 2013–2019
Trichloroacetic Acid
0.7000 µg/L
No EPA limit set
 1/5 SYR4 2013–2019
54 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
TOWN OF DENTON
Phone
406-567-2571
Email
[email protected]

Frequently asked questions about Denton Town of

Is Denton Town of tap water safe to drink?

EPA monitoring detected 19 contaminants in Denton Town of'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 Denton Town of's water?

EPA monitoring detected Nitrate-Nitrite, Lead, Copper, TTHM, Bromodichloromethane, and others. The full list with the level and data source for each is above.

How many people does Denton Town of serve?

Denton Town of reports serving 255 people in Montana, per its EPA record.

Has Denton Town of had any water quality violations?

The EPA has 433 violations on file for Denton Town of, of which 359 are health-based (a contaminant limit or required treatment was breached) and 5 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.