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Tap water quality report

Silverthorne Town of

EPA monitoring tested this supplier for 107 contaminants and detected 25. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

107
contaminants tested
25
detected
8,400
people served
3
health-based violations
Colorado rankingsLead in ColoradoPFAS in Colorado
Water source
Ground water
Ownership
Local government
Counties served
Summit

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.

3
health-based violations
361
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1998-11-01 → 1998-11-30
MCL Health-based Resolved 1998-11-01 → 1998-11-30
MCL Health-based Resolved 1998-11-01 → 1998-11-30
Other Monitoring Resolved 2025-07-01
Other Monitoring Resolved 2025-07-01
Other Monitoring Resolved 2025-07-01
MR Monitoring Resolved 2024-01-01 → 2024-12-31
MR Monitoring Resolved 2024-01-01 → 2024-12-31
MR Monitoring Resolved 2024-01-01 → 2024-12-31
MR Monitoring Resolved 2024-01-01 → 2024-12-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0059 µg/L 3/8 2025
PFHXS 0.0037 µg/L 2/8 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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
808.5 µg/L 8.1%
of the EPA limit 10000 µg/L
worst single sample: 1200 µg/L
64/64 SYR4 2012–2019
Fluoride
580 µg/L 14%
of the EPA limit 4000 µg/L
worst single sample: 850 µg/L
43/43 SYR4 2012–2018
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 20/20 LCR 2025
Barium
140.75 µg/L 7%
of the EPA limit 2000 µg/L
worst single sample: 145 µg/L
18/18 SYR4 2012–2019
Nitrate-Nitrite
985.5 µg/L 9.9%
of the EPA limit 10000 µg/L
worst single sample: 1200 µg/L
12/12 SYR4 2013–2015
TTHM
15.335 µg/L 19%
of the EPA limit 80 µg/L
worst single sample: 16.6 µg/L
12/13 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
3.315 µg/L 5.5%
of the EPA limit 60 µg/L
worst single sample: 3.7 µg/L
12/13 SYR4 2012–2019
Lithium
25 µg/L
No EPA limit set
 8/8 UCMR-5 2025
Dibromochloromethane
5.36 µg/L
No EPA limit set
worst single sample: 5.9 µg/L
7/11 SYR4 2013–2019
Bromodichloromethane
3.95 µg/L
No EPA limit set
worst single sample: 4.2 µg/L
6/11 SYR4 2013–2019
Bromoform
2.075 µg/L
No EPA limit set
worst single sample: 2.1 µg/L
6/11 SYR4 2013–2019
Dibromoacetic Acid
1.9 µg/L
No EPA limit set
 6/7 SYR4 2015–2019
Gross Alpha, Excl. Radon And U
3.075 pCi/L 21%
of the EPA limit 15 pCi/L
worst single sample: 3.4 pCi/L
6/7 SYR4 2013–2015
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
 5/18 SYR4 2012–2019
Combined Uranium
1.302 µg/L 4.3%
of the EPA limit 30 µg/L
worst single sample: 1.4 µg/L
5/7 SYR4 2013–2015
Chloroform
1.925 µg/L
No EPA limit set
worst single sample: 2 µg/L
4/11 SYR4 2013–2019
Combined Radium (-226 And -228)
0.3700 pCi/L 7.4%
of the EPA limit 5 pCi/L
worst single sample: 0.4000 pCi/L
3/4 SYR4 2013
Di(2-ethylhexyl) Phthalate
0.7900 µg/L 13%
of the EPA limit 6 µg/L
worst single sample: 0.8000 µg/L
3/32 SYR4 2013–2019
Selenium
1.9 µg/L 3.8%
of the EPA limit 50 µg/L
worst single sample: 2 µg/L
3/18 SYR4 2012–2019
Xylenes, Total
2.46 µg/L 0%
of the EPA limit 10000 µg/L
worst single sample: 2.6 µg/L
3/20 SYR4 2013–2019
Dichloroacetic Acid
1.955 µg/L
No EPA limit set
worst single sample: 2 µg/L
2/7 SYR4 2015–2019
Mercury
0.1200 µg/L 6%
of the EPA limit 2 µg/L
 2/18 SYR4 2012–2019
Cadmium
0.2100 µg/L 4.2%
of the EPA limit 5 µg/L
 1/18 SYR4 2012–2019
82 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
EYTEL, MIKE
Phone
970-262-7344
Email
[email protected]

Frequently asked questions about Silverthorne Town of

Is Silverthorne Town of tap water safe to drink?

EPA monitoring detected 25 contaminants in Silverthorne Town 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 Silverthorne Town of's water?

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

How many people does Silverthorne Town of serve?

Silverthorne Town of reports serving 8,400 people in Colorado, per its EPA record.

Has Silverthorne Town of had any water quality violations?

The EPA has 361 violations on file for Silverthorne Town of, of which 3 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.