Is Hidden Valley Water District Tap Water Safe? Quality Report

Water source: SWP
Ownership: Private
Counties served: Jefferson

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.

124

health-based violations

198

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2024-10-17
TT	Health-based	Resolved	2024-10-17
TT	Health-based	Resolved	2024-10-17
TT	Health-based	Resolved	2023-12-01
TT	Health-based	Resolved	2023-12-01
TT	Health-based	Resolved	2023-12-01
TT	Health-based	Resolved	2023-12-01
MCL	Health-based	Resolved	2018-04-01 → 2018-06-30
MCL	Health-based	Resolved	2018-04-01 → 2018-06-30
MCL	Health-based	Resolved	2018-04-01 → 2018-06-30

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	11500 µg/L 115% of the EPA limit, at the 95th percentile of samples — 10000 µg/L worst single sample: 11700 µg/L	44/44	SYR4	2012–2019
Combined Radium (-226 And -228)	6.81 pCi/L 136% of the EPA limit, at the 95th percentile of samples — 5 pCi/L worst single sample: 8 pCi/L	30/30	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	16.825 pCi/L 112% of the EPA limit, at the 95th percentile of samples — 15 pCi/L worst single sample: 18.63 pCi/L	26/27	SYR4	2012–2019
Combined Uranium	12.032 µg/L 40% of the EPA limit 30 µg/L worst single sample: 17.88 µg/L	18/27	SYR4	2012–2019
Lead	0.0035 mg/L 23% of the EPA limit 0.0150 mg/L	17/17	LCR	2025
Barium	206.6 µg/L 10% of the EPA limit 2000 µg/L worst single sample: 213 µg/L	3/3	SYR4	2012–2018
Chromium	3 µg/L 3% of the EPA limit 100 µg/L	3/3	SYR4	2012–2018
Fluoride	186 µg/L 4.7% of the EPA limit 4000 µg/L worst single sample: 190 µg/L	3/3	SYR4	2012–2018
Selenium	2 µg/L 4% of the EPA limit 50 µg/L	3/3	SYR4	2012–2018
TTHM	18.77 µg/L 23% of the EPA limit 80 µg/L worst single sample: 18.9 µg/L	3/3	SYR4	2012–2018
Total Haloacetic Acids (HAA5)	4.702 µg/L 7.8% of the EPA limit 60 µg/L worst single sample: 4.8 µg/L	3/3	SYR4	2012–2018
Arsenic	2.9 µg/L 29% of the EPA limit 10 µg/L worst single sample: 3 µg/L	2/3	SYR4	2012–2018
Bromodichloromethane	2.825 µg/L No EPA limit set worst single sample: 2.9 µg/L	2/3	SYR4	2012–2018
Bromoform	8.595 µg/L No EPA limit set worst single sample: 8.7 µg/L	2/3	SYR4	2012–2018
Chloroform	4.065 µg/L No EPA limit set worst single sample: 4.1 µg/L	2/3	SYR4	2012–2018
Dibromoacetic Acid	4.701 µg/L No EPA limit set worst single sample: 4.8 µg/L	2/2	SYR4	2015–2018
Dibromochloromethane	5.865 µg/L No EPA limit set worst single sample: 6 µg/L	2/3	SYR4	2012–2018
Monochloroacetic Acid	1.01 µg/L No EPA limit set	1/2	SYR4	2015–2018
Nitrate-Nitrite	200 µg/L 2% of the EPA limit 10000 µg/L	1/1	SYR4	2012

58 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: SIMONSON, JUDY
Phone: 303-674-3379
Email: [email protected]

Frequently asked questions about Hidden Valley Water District

Is Hidden Valley Water District tap water safe to drink?

EPA monitoring detected 19 contaminants in Hidden Valley Water District'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 Hidden Valley Water District's water?

EPA monitoring detected Nitrate, Combined Radium (-226 And -228), Gross Alpha, Excl. Radon And U, Combined Uranium, Lead, and others. The full list with the level and data source for each is above.

How many people does Hidden Valley Water District serve?

Hidden Valley Water District reports serving 155 people in Colorado, per its EPA record.

Has Hidden Valley Water District had any water quality violations?

The EPA has 198 violations on file for Hidden Valley Water District, of which 124 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.