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.
53
health-based violations
85
violations on file
5
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| TT | Health-based | Unaddressed | 2024-10-17 |
| MCL | Health-based | Resolved | 2022-10-01 → 2022-12-31 |
| MCL | Health-based | Resolved | 2022-10-01 → 2022-12-31 |
| MCL | Health-based | Resolved | 2022-07-01 → 2022-09-30 |
| MCL | Health-based | Resolved | 2022-07-01 → 2022-09-30 |
| MCL | Health-based | Resolved | 2022-04-01 → 2022-06-30 |
| MCL | Health-based | Resolved | 2022-04-01 → 2022-06-30 |
| MCL | Health-based | Resolved | 2022-01-01 → 2022-03-31 |
| MCL | Health-based | Resolved | 2022-01-01 → 2022-03-31 |
| MCL | Health-based | Resolved | 2021-10-01 → 2021-12-31 |
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 |
|---|---|---|---|---|
| Combined Uranium | 20.6648 µg/L 69% of the EPA limit 30 µg/L
worst single sample: 30.9473 µg/L | 44/53 | SYR4 | 2012–2018 |
| Fluoride | 2400 µg/L 60% of the EPA limit 4000 µg/L | 37/40 | SYR4 | 2012–2019 |
| Arsenic | 7.09 µg/L 71% of the EPA limit 10 µg/L
worst single sample: 8.5 µg/L | 32/33 | SYR4 | 2012–2019 |
| Lead | 0.0084 mg/L 56% of the EPA limit 0.0150 mg/L | 20/20 | LCR | 2022 |
| Barium | 19.3 µg/L 1% of the EPA limit 2000 µg/L
worst single sample: 38 µg/L | 18/33 | SYR4 | 2012–2019 |
| Lithium | 106 µg/L No EPA limit set | 18/18 | UCMR-5 | 2025 |
| Nitrate | 2100 µg/L 21% of the EPA limit 10000 µg/L | 14/336 | SYR4 | 2012–2019 |
| Copper | 18.395 µg/L 1.4% of the EPA limit 1300 µg/L
worst single sample: 20 µg/L | 4/33 | SYR4 | 2012–2019 |
| Bromodichloromethane | 11.9 µg/L No EPA limit set
worst single sample: 12 µg/L | 3/5 | SYR4 | 2012–2018 |
| Bromoform | 1.88 µg/L No EPA limit set
worst single sample: 1.9 µg/L | 3/5 | SYR4 | 2012–2018 |
| Chloroform | 14 µg/L No EPA limit set | 3/5 | SYR4 | 2012–2018 |
| Dibromoacetic Acid | 4.3 µg/L No EPA limit set
worst single sample: 4.4 µg/L | 3/3 | SYR4 | 2015–2018 |
| Dibromochloromethane | 9 µg/L No EPA limit set
worst single sample: 9.1 µg/L | 3/5 | SYR4 | 2012–2018 |
| Dichloroacetic Acid | 7.03 µg/L No EPA limit set
worst single sample: 7.2 µg/L | 3/3 | SYR4 | 2015–2018 |
| TTHM | 36.8 µg/L 46% of the EPA limit 80 µg/L
worst single sample: 37 µg/L | 3/5 | SYR4 | 2012–2018 |
| Total Haloacetic Acids (HAA5) | 17.6 µg/L 29% of the EPA limit 60 µg/L
worst single sample: 18 µg/L | 3/3 | SYR4 | 2015–2018 |
| Trichloroacetic Acid | 4.08 µg/L No EPA limit set
worst single sample: 4.2 µg/L | 3/3 | SYR4 | 2015–2018 |
| Asbestos | 6.665 MFL 95% of the EPA limit 7 MFL
worst single sample: 6.9 MFL | 2/14 | SYR4 | 2018 |
| Cyanide | 10.88 µg/L 5.4% of the EPA limit 200 µg/L
worst single sample: 11 µg/L | 2/14 | SYR4 | 2016–2019 |
| Chromium | 13.55 µg/L 14% of the EPA limit 100 µg/L
worst single sample: 14 µg/L | 2/33 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 2.65 µg/L No EPA limit set
worst single sample: 2.7 µg/L | 2/3 | SYR4 | 2015–2018 |
| Nitrite | 0.5935 µg/L 0.1% of the EPA limit 1000 µg/L
worst single sample: 0.6000 µg/L | 2/168 | SYR4 | 2012–2019 |
| Diquat | 5 µg/L 25% of the EPA limit 20 µg/L | 1/16 | SYR4 | 2012–2019 |
| Lead | 2.2 µg/L 15% of the EPA limit 15 µg/L | 1/33 | SYR4 | 2012–2019 |
| Selenium | 1.6 µg/L 3.2% of the EPA limit 50 µg/L | 1/33 | SYR4 | 2012–2019 |
| Toluene | 1 µg/L 0.1% of the EPA limit 1000 µg/L | 1/71 | SYR4 | 2012–2019 |
78 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, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Yosemite Spring Park Util Co
Is Yosemite Spring Park Util Co tap water safe to drink?
EPA monitoring detected 32 contaminants in Yosemite Spring Park Util Co'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 Yosemite Spring Park Util Co's water?
EPA monitoring detected Combined Uranium, Fluoride, Arsenic, Lead, Barium, and others. The full list with the level and data source for each is above.
How many people does Yosemite Spring Park Util Co serve?
Yosemite Spring Park Util Co reports serving 5,300 people in California, per its EPA record.
Has Yosemite Spring Park Util Co had any water quality violations?
The EPA has 85 violations on file for Yosemite Spring Park Util Co, of which 53 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.