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.
10
health-based violations
254
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Archived | 2003-07-01 → 2003-07-31 |
| MCL | Health-based | Archived | 2003-07-01 → 2003-07-31 |
| MCL | Health-based | Archived | 2003-07-01 → 2003-07-31 |
| MCL | Health-based | Archived | 2001-10-01 → 2001-10-31 |
| MCL | Health-based | Archived | 2001-10-01 → 2001-10-31 |
| MCL | Health-based | Archived | 2001-10-01 → 2001-10-31 |
| MCL | Health-based | Archived | 1999-05-01 → 1999-05-31 |
| MCL | Health-based | Archived | 1998-08-01 → 1998-08-31 |
| MCL | Health-based | Archived | 1991-03-01 → 1991-03-31 |
| MCL | Health-based | Archived | 1991-03-01 → 1991-03-31 |
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 |
|---|---|---|---|---|
| Copper | 209.29 µg/L 16% of the EPA limit 1300 µg/L
worst single sample: 340.5 µg/L | 128/128 | SYR4 | 2012–2018 |
| Nitrate | 1700 µg/L 17% of the EPA limit 10000 µg/L
worst single sample: 1837.7 µg/L | 114/114 | SYR4 | 2012–2019 |
| Lead | 3.56 µg/L 24% of the EPA limit 15 µg/L
worst single sample: 14.6 µg/L | 113/128 | SYR4 | 2012–2018 |
| Thallium, Total | 4.92 µg/L 246% of the EPA limit, at the 95th percentile of samples — 2 µg/L
worst single sample: 7.7 µg/L | 93/215 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 5.22 pCi/L 35% of the EPA limit 15 pCi/L
worst single sample: 8.2 pCi/L | 33/36 | SYR4 | 2013–2019 |
| Gross Beta Particle Activity | 6.635 pCi/L No EPA limit set
worst single sample: 7 pCi/L | 32/37 | SYR4 | 2013–2019 |
| Arsenic | 8.6 µg/L 86% of the EPA limit 10 µg/L
worst single sample: 16.2 µg/L | 24/27 | SYR4 | 2012–2019 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L | 24/24 | LCR | 2024 |
| TTHM | 41.975 µg/L 52% of the EPA limit 80 µg/L
worst single sample: 59.6 µg/L | 24/79 | SYR4 | 2012–2019 |
| Barium | 237.8 µg/L 12% of the EPA limit 2000 µg/L
worst single sample: 247 µg/L | 21/21 | SYR4 | 2012–2019 |
| Fluoride | 850 µg/L 21% of the EPA limit 4000 µg/L
worst single sample: 4000 µg/L | 19/19 | SYR4 | 2012–2019 |
| Selenium | 8.335 µg/L 17% of the EPA limit 50 µg/L
worst single sample: 10.8 µg/L | 18/21 | SYR4 | 2012–2019 |
| Dibromochloromethane | 2.63 µg/L No EPA limit set
worst single sample: 4.1 µg/L | 15/74 | SYR4 | 2012–2019 |
| Bromodichloromethane | 11.35 µg/L No EPA limit set
worst single sample: 14.1 µg/L | 12/74 | SYR4 | 2012–2019 |
| Bromoform | 1.88 µg/L No EPA limit set
worst single sample: 2.1 µg/L | 12/74 | SYR4 | 2012–2019 |
| Chloroform | 36.065 µg/L No EPA limit set
worst single sample: 41.4 µg/L | 12/74 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 1600 µg/L 16% of the EPA limit 10000 µg/L | 11/11 | SYR4 | 2013–2016 |
| Lithium | 21.4 µg/L No EPA limit set | 8/16 | UCMR-5 | 2025 |
| Dichloroacetic Acid | 16.3 µg/L No EPA limit set
worst single sample: 16.5 µg/L | 5/71 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 33.14 µg/L 55% of the EPA limit 60 µg/L
worst single sample: 33.2 µg/L | 4/80 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 17.21 µg/L No EPA limit set
worst single sample: 17.3 µg/L | 4/71 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 0.6590 pCi/L 13% of the EPA limit 5 pCi/L
worst single sample: 0.6700 pCi/L | 3/3 | SYR4 | 2015–2016 |
| Dibromoacetic Acid | 1.575 µg/L No EPA limit set
worst single sample: 1.6 µg/L | 2/71 | SYR4 | 2012–2019 |
| Mercury | 0.2000 µg/L 10% of the EPA limit 2 µg/L | 1/22 | SYR4 | 2012–2019 |
82 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, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Lehi City
Is Lehi City tap water safe to drink?
EPA monitoring detected 24 contaminants in Lehi 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 Lehi City's water?
EPA monitoring detected Copper, Nitrate, Lead, Thallium, Total, Gross Alpha, Excl. Radon And U, and others. The full list with the level and data source for each is above.
How many people does Lehi City serve?
Lehi City reports serving 93,446 people in Utah, per its EPA record.
Has Lehi City had any water quality violations?
The EPA has 254 violations on file for Lehi City, of which 10 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.