Is Arvada City of Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2013-09-01 → 2013-09-30
TT	Health-based	Resolved	2013-09-01 → 2013-09-30
TT	Health-based	Resolved	2013-09-01 → 2013-09-30
TT	Health-based	Resolved	2013-09-01 → 2013-09-30
MR	Monitoring	Resolved	2024-06-01 → 2024-06-30
MR	Monitoring	Resolved	2024-06-01 → 2024-06-30
MR	Monitoring	Resolved	2024-06-01 → 2024-06-30
MR	Monitoring	Resolved	2024-05-01 → 2024-05-31
MR	Monitoring	Resolved	2024-05-01 → 2024-05-31
MR	Monitoring	Resolved	2024-05-01 → 2024-05-31

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
TTHM	66.135 µg/L 83% of the EPA limit 80 µg/L worst single sample: 156 µg/L	288/288	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	49.395 µg/L 82% of the EPA limit 60 µg/L worst single sample: 68.5 µg/L	288/288	SYR4	2012–2019
Combined Radium (-226 And -228)	1.6 pCi/L 32% of the EPA limit 5 pCi/L worst single sample: 2.6 pCi/L	122/142	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	2 pCi/L 13% of the EPA limit 15 pCi/L worst single sample: 5.6 pCi/L	72/142	SYR4	2012–2019
Fluoride	848.5 µg/L 21% of the EPA limit 4000 µg/L worst single sample: 930 µg/L	44/44	SYR4	2012–2019
Barium	36 µg/L 1.8% of the EPA limit 2000 µg/L worst single sample: 37 µg/L	40/40	SYR4	2012–2019
Gross Beta Particle Activity	3.49 pCi/L No EPA limit set worst single sample: 4.8 pCi/L	27/141	SYR4	2012–2019
Lead	0.0031 mg/L 21% of the EPA limit 0.0150 mg/L	20/20	LCR	2025
Nitrate	160 µg/L 1.6% of the EPA limit 10000 µg/L	20/78	SYR4	2012–2019
Bromodichloromethane	5.64 µg/L No EPA limit set worst single sample: 7 µg/L	17/17	SYR4	2012–2019
Chloroform	40.58 µg/L No EPA limit set worst single sample: 42.1 µg/L	17/17	SYR4	2012–2019
Dichloroacetic Acid	15.85 µg/L No EPA limit set worst single sample: 16.3 µg/L	16/16	SYR4	2018–2019
Trichloroacetic Acid	20.775 µg/L No EPA limit set worst single sample: 23.1 µg/L	16/16	SYR4	2018–2019
Combined Uranium	2.46 µg/L 8.2% of the EPA limit 30 µg/L worst single sample: 2.9 µg/L	12/140	SYR4	2012–2019
Nitrate-Nitrite	155.5 µg/L 1.6% of the EPA limit 10000 µg/L worst single sample: 160 µg/L	10/39	SYR4	2012–2019
Dibromochloromethane	1.136 µg/L No EPA limit set worst single sample: 1.2 µg/L	5/17	SYR4	2012–2019
Monochloroacetic Acid	1.37 µg/L No EPA limit set worst single sample: 1.4 µg/L	4/16	SYR4	2018–2019
Di(2-ethylhexyl) Phthalate	0.8200 µg/L 14% of the EPA limit 6 µg/L	1/23	SYR4	2012–2019
Lithium	9.6 µg/L No EPA limit set	1/8	UCMR-5	2024

92 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, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDibromoacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: RHODES, EVELYN
Phone: 720-898-7802
Email: [email protected]

Frequently asked questions about Arvada City of

Is Arvada City of tap water safe to drink?

EPA monitoring detected 19 contaminants in Arvada 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 Arvada City of's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Combined Radium (-226 And -228), Gross Alpha, Excl. Radon And U, Fluoride, and others. The full list with the level and data source for each is above.

How many people does Arvada City of serve?

Arvada City of reports serving 171,610 people in Colorado, per its EPA record.

Has Arvada City of had any water quality violations?

The EPA has 18 violations on file for Arvada City of, of which 4 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.