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.
16
health-based violations
87
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2010-07-01 → 2010-09-30 |
| MCL | Health-based | Resolved | 2010-07-01 → 2010-09-30 |
| MCL | Health-based | Resolved | 2010-07-01 → 2010-09-30 |
| MCL | Health-based | Resolved | 2010-07-01 → 2010-09-30 |
| MCL | Health-based | Resolved | 2005-01-01 → 2005-12-31 |
| MCL | Health-based | Resolved | 2005-01-01 → 2005-12-31 |
| MCL | Health-based | Resolved | 2005-01-01 → 2005-12-31 |
| MCL | Health-based | Resolved | 2005-01-01 → 2005-12-31 |
| MCL | Health-based | Resolved | 2004-08-01 → 2004-08-31 |
| MCL | Health-based | Resolved | 2004-08-01 → 2004-08-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
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 | 8500 µg/L 85% of the EPA limit 10000 µg/L
worst single sample: 9800 µg/L | 334/362 | SYR4 | 2012–2019 |
| Arsenic | 7 µg/L 70% of the EPA limit 10 µg/L
worst single sample: 9 µg/L | 54/54 | SYR4 | 2013–2019 |
| Nitrate-Nitrite | 7029 µg/L 70% of the EPA limit 10000 µg/L
worst single sample: 9520 µg/L | 54/55 | SYR4 | 2012–2019 |
| Combined Uranium | 29 µg/L 97% of the EPA limit 30 µg/L
worst single sample: 41 µg/L | 50/51 | SYR4 | 2012–2019 |
| Fluoride | 500 µg/L 13% of the EPA limit 4000 µg/L | 43/52 | SYR4 | 2013–2019 |
| Gross Beta Particle Activity | 18.75 pCi/L No EPA limit set
worst single sample: 25 pCi/L | 39/39 | SYR4 | 2012–2018 |
| Lithium | 59 µg/L No EPA limit set | 38/38 | UCMR-5 | 2025 |
| Copper | 9.25 µg/L 0.7% of the EPA limit 1300 µg/L
worst single sample: 58 µg/L | 32/50 | SYR4 | 2013–2019 |
| Barium | 130 µg/L 6.5% of the EPA limit 2000 µg/L
worst single sample: 150 µg/L | 25/25 | SYR4 | 2013–2019 |
| Chromium | 3.15 µg/L 3.2% of the EPA limit 100 µg/L
worst single sample: 4 µg/L | 18/25 | SYR4 | 2013–2019 |
| Combined Radium (-226 And -228) | 1.15715 pCi/L 23% of the EPA limit 5 pCi/L
worst single sample: 1.26 pCi/L | 18/20 | SYR4 | 2014–2019 |
| Trichloroethylene | 3.2 µg/L 64% of the EPA limit 5 µg/L
worst single sample: 4.9 µg/L | 18/74 | SYR4 | 2012–2019 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L | 15/15 | LCR | 2025 |
| TTHM | 4.87 µg/L 6.1% of the EPA limit 80 µg/L
worst single sample: 5 µg/L | 14/37 | SYR4 | 2012–2019 |
| Bromoform | 2.82 µg/L No EPA limit set
worst single sample: 3.6 µg/L | 13/45 | SYR4 | 2012–2019 |
| Dibromochloromethane | 1.845 µg/L No EPA limit set
worst single sample: 1.9 µg/L | 12/45 | SYR4 | 2012–2019 |
| Selenium | 15.85 µg/L 32% of the EPA limit 50 µg/L
worst single sample: 19 µg/L | 10/25 | SYR4 | 2013–2019 |
| Bromodichloromethane | 0.8520 µg/L No EPA limit set
worst single sample: 0.8900 µg/L | 5/45 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 1.77 µg/L No EPA limit set
worst single sample: 1.8 µg/L | 3/14 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 0.9440 µg/L 19% of the EPA limit 5 µg/L
worst single sample: 0.9700 µg/L | 3/73 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 4.74 µg/L 7.9% of the EPA limit 60 µg/L
worst single sample: 5.1 µg/L | 3/14 | SYR4 | 2012–2019 |
| Chloroform | 0.4500 µg/L No EPA limit set | 2/45 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 2.805 pCi/L 19% of the EPA limit 15 pCi/L
worst single sample: 2.9 pCi/L | 2/2 | SYR4 | 2019 |
| Nitrite | 10 µg/L 1% of the EPA limit 1000 µg/L | 2/56 | SYR4 | 2012–2019 |
| Cadmium | 1 µg/L 20% of the EPA limit 5 µg/L | 1/25 | SYR4 | 2013–2019 |
| Lead | 5 µg/L 33% of the EPA limit 15 µg/L | 1/20 | SYR4 | 2013–2019 |
| Mercury | 0.1000 µg/L 5% of the EPA limit 2 µg/L | 1/29 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 3.3 µg/L No EPA limit set | 1/14 | SYR4 | 2012–2019 |
79 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Elko City of
Is Elko City of tap water safe to drink?
EPA monitoring detected 35 contaminants in Elko City 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 Elko City of's water?
EPA monitoring detected Nitrate, Arsenic, Nitrate-Nitrite, Combined Uranium, Fluoride, and others. The full list with the level and data source for each is above.
How many people does Elko City of serve?
Elko City of reports serving 23,000 people in Nevada, per its EPA record.
Has Elko City of had any water quality violations?
The EPA has 87 violations on file for Elko City of, of which 16 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.