Is Mapleton City Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Utah

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.

health-based violations

694

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2003-08-01 → 2003-08-31
MCL	Health-based	Resolved	2003-08-01 → 2003-08-31
MCL	Health-based	Resolved	2003-08-01 → 2003-08-31
MCL	Health-based	Resolved	2003-08-01 → 2003-08-31
MCL	Health-based	Archived	2001-01-01 → 2001-01-31
MCL	Health-based	Archived	2001-01-01 → 2001-01-31
Other	Monitoring	Resolved	2025-10-02
Other	Monitoring	Resolved	2025-10-02
MON	Monitoring	Resolved	2020-03-01 → 2020-03-31
MON	Monitoring	Resolved	2020-03-01 → 2020-03-31

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	4440 µg/L 44% of the EPA limit 10000 µg/L worst single sample: 8530 µg/L	134/164	SYR4	2012–2019
Nitrate-Nitrite	4024 µg/L 40% of the EPA limit 10000 µg/L worst single sample: 4530 µg/L	52/53	SYR4	2012–2019
Copper	229.95 µg/L 18% of the EPA limit 1300 µg/L worst single sample: 372.8 µg/L	40/40	SYR4	2015–2018
Lead	7.4 µg/L 49% of the EPA limit 15 µg/L worst single sample: 12.4 µg/L	29/40	SYR4	2015–2018
Lead	0.0024 mg/L 16% of the EPA limit 0.0150 mg/L	22/22	LCR	2024
Barium	102.8 µg/L 5.1% of the EPA limit 2000 µg/L worst single sample: 104 µg/L	13/13	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	5.925 pCi/L 39% of the EPA limit 15 pCi/L worst single sample: 6.2 pCi/L	12/14	SYR4	2012–2019
Selenium	4.1 µg/L 8.2% of the EPA limit 50 µg/L worst single sample: 6.4 µg/L	11/13	SYR4	2012–2019
Gross Beta Particle Activity	8.965 pCi/L No EPA limit set worst single sample: 9.7 pCi/L	8/9	SYR4	2013–2019
Fluoride	290.72 µg/L 7.3% of the EPA limit 4000 µg/L worst single sample: 329.6 µg/L	7/14	SYR4	2012–2019
Combined Radium (-226 And -228)	1.655 pCi/L 33% of the EPA limit 5 pCi/L worst single sample: 1.7 pCi/L	4/4	SYR4	2014–2016
Arsenic	1.17 µg/L 12% of the EPA limit 10 µg/L worst single sample: 1.2 µg/L	2/14	SYR4	2012–2019
Cyanide	2 µg/L 1% of the EPA limit 200 µg/L	1/14	SYR4	2012–2019
Cadmium	0.2000 µg/L 4% of the EPA limit 5 µg/L	1/14	SYR4	2012–2019

92 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ROUNDY, BRADLEY C
Phone: 801-806-9156
Email: [email protected]

Frequently asked questions about Mapleton City

Is Mapleton City tap water safe to drink?

EPA monitoring detected 14 contaminants in Mapleton City'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 Mapleton City's water?

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

How many people does Mapleton City serve?

Mapleton City reports serving 14,000 people in Utah, per its EPA record.

Has Mapleton City had any water quality violations?

The EPA has 694 violations on file for Mapleton City, of which 6 are health-based (a contaminant limit or required treatment was breached) and 0 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.