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.
1
health-based violations
1
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| TT | Health-based | Resolved | 1992-01-01 → 1996-07-01 |
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 |
|---|---|---|---|---|
| Arsenic | 12 µg/L 120% of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 17.3 µg/L | 669/963 | SYR4 | 2012–2019 |
| Nitrate | 3673 µg/L 37% of the EPA limit 10000 µg/L
worst single sample: 7800 µg/L | 480/688 | SYR4 | 2012–2019 |
| TTHM | 53 µg/L 66% of the EPA limit 80 µg/L
worst single sample: 75 µg/L | 348/359 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 41 µg/L 68% of the EPA limit 60 µg/L
worst single sample: 59 µg/L | 346/358 | SYR4 | 2012–2019 |
| Chloroform | 48 µg/L No EPA limit set
worst single sample: 70 µg/L | 299/310 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 24.15 µg/L No EPA limit set
worst single sample: 37 µg/L | 298/310 | SYR4 | 2012–2019 |
| Bromodichloromethane | 9.0125 µg/L No EPA limit set
worst single sample: 14 µg/L | 296/310 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 17.64 µg/L No EPA limit set
worst single sample: 27 µg/L | 290/310 | SYR4 | 2012–2019 |
| Combined Uranium | 6.68 µg/L 22% of the EPA limit 30 µg/L
worst single sample: 15 µg/L | 105/141 | SYR4 | 2012–2019 |
| Barium | 98.595 µg/L 4.9% of the EPA limit 2000 µg/L
worst single sample: 162 µg/L | 104/112 | SYR4 | 2012–2019 |
| Dibromochloromethane | 8.958 µg/L No EPA limit set
worst single sample: 12 µg/L | 92/310 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 2945 µg/L 29% of the EPA limit 10000 µg/L
worst single sample: 7800 µg/L | 92/143 | SYR4 | 2012–2019 |
| Antimony, Total | 5.648 µg/L 94% of the EPA limit 6 µg/L
worst single sample: 6.08 µg/L | 49/220 | SYR4 | 2012–2019 |
| Bromoform | 5.32 µg/L No EPA limit set
worst single sample: 6.1 µg/L | 37/310 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 3.4 µg/L 68% of the EPA limit 5 µg/L
worst single sample: 4.21 µg/L | 33/291 | SYR4 | 2012–2019 |
| Chromium | 14.1 µg/L 14% of the EPA limit 100 µg/L
worst single sample: 27.7 µg/L | 23/112 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 23/23 | LCR | 2025 |
| Dibromoacetic Acid | 2.195 µg/L No EPA limit set
worst single sample: 2.61 µg/L | 22/310 | SYR4 | 2012–2019 |
| Trichloroethylene | 1.318 µg/L 26% of the EPA limit 5 µg/L
worst single sample: 1.71 µg/L | 17/290 | SYR4 | 2012–2019 |
| Lithium | 100 µg/L No EPA limit set | 15/142 | UCMR-5 | 2025 |
| Monochloroacetic Acid | 4.58 µg/L No EPA limit set
worst single sample: 4.7 µg/L | 9/310 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 17.6 µg/L No EPA limit set
worst single sample: 19 µg/L | 8/310 | SYR4 | 2012–2019 |
| Thallium, Total | 5.89 µg/L 295% of the EPA limit, at the 95th percentile of samples — 2 µg/L
worst single sample: 7.9 µg/L | 7/131 | SYR4 | 2012–2019 |
| Copper | 10 µg/L 0.8% of the EPA limit 1300 µg/L | 6/131 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 7.45 pCi/L No EPA limit set
worst single sample: 7.9 pCi/L | 6/19 | SYR4 | 2012–2015 |
| Combined Radium (-226 And -228) | 3.514 pCi/L 70% of the EPA limit 5 pCi/L
worst single sample: 4 pCi/L | 5/94 | SYR4 | 2012–2019 |
| Fluoride | 287.2 µg/L 7.2% of the EPA limit 4000 µg/L
worst single sample: 290 µg/L | 5/159 | SYR4 | 2012–2019 |
| 2,4-D | 0.2225 µg/L 0.3% of the EPA limit 70 µg/L
worst single sample: 0.2300 µg/L | 4/243 | SYR4 | 2012–2019 |
| Mercury | 0.2527 µg/L 13% of the EPA limit 2 µg/L
worst single sample: 0.2620 µg/L | 4/112 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 0.6250 µg/L 8.9% of the EPA limit 7 µg/L
worst single sample: 0.6300 µg/L | 3/290 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 5.06 pCi/L 34% of the EPA limit 15 pCi/L
worst single sample: 5.4 pCi/L | 3/20 | SYR4 | 2012–2018 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0190 µg/L 9.5% of the EPA limit 0.2000 µg/L | 2/243 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 0.9400 µg/L 16% of the EPA limit 6 µg/L | 2/244 | SYR4 | 2012–2019 |
| Hexachlorocyclopentadiene | 0.0690 µg/L 0.1% of the EPA limit 50 µg/L
worst single sample: 0.0700 µg/L | 2/241 | SYR4 | 2012–2019 |
| Benzo(A)Pyrene | 0.1100 µg/L 55% of the EPA limit 0.2000 µg/L | 1/242 | SYR4 | 2012–2019 |
| Cyanide | 39 µg/L 20% of the EPA limit 200 µg/L | 1/111 | SYR4 | 2012–2019 |
| Dalapon | 0.4200 µg/L 0.2% of the EPA limit 200 µg/L | 1/240 | SYR4 | 2012–2019 |
69 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAsbestosAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideLassoLeadMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Truckee Meadows Water Authority
Is Truckee Meadows Water Authority tap water safe to drink?
EPA monitoring detected 45 contaminants in Truckee Meadows Water Authority'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 Truckee Meadows Water Authority's water?
EPA monitoring detected Arsenic, Nitrate, TTHM, Total Haloacetic Acids (HAA5), Chloroform, and others. The full list with the level and data source for each is above.
How many people does Truckee Meadows Water Authority serve?
Truckee Meadows Water Authority reports serving 442,000 people in Nevada, per its EPA record.
Has Truckee Meadows Water Authority had any water quality violations?
The EPA has 1 violation on file for Truckee Meadows Water Authority, of which 1 is 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.