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Tap water quality report

Aspen City of

EPA monitoring tested this supplier for 107 contaminants and detected 20. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

107
contaminants tested
20
detected
31,100
people served
3
health-based violations
Colorado rankingsLead in ColoradoPFAS in Colorado
Water source
Surface water
Ownership
Local government
Counties served
Pitkin

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
214
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 1995-11-01 → 1995-11-30
TT Health-based Resolved 1995-11-01 → 1995-11-30
TT Health-based Resolved 1995-11-01 → 1995-11-30
MR Monitoring Resolved 2025-03-01 → 2025-03-31
MR Monitoring Resolved 2025-03-01 → 2025-03-31
MR Monitoring Resolved 2025-03-01 → 2025-03-31
MON Monitoring Resolved 2025-03-01 → 2025-03-31
MON Monitoring Resolved 2025-03-01 → 2025-03-31
MON Monitoring Resolved 2025-03-01 → 2025-03-31
MR Monitoring Resolved 2025-01-01 → 2025-03-31

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
TTHM
20.6 µg/L 26%
of the EPA limit 80 µg/L
 65/67 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
20.8 µg/L 35%
of the EPA limit 60 µg/L
 64/64 SYR4 2012–2019
Nitrate
710 µg/L 7.1%
of the EPA limit 10000 µg/L
 42/46 SYR4 2012–2019
Fluoride
1000 µg/L 25%
of the EPA limit 4000 µg/L
 21/25 SYR4 2012–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2023
Chloroform
14.4 µg/L
No EPA limit set
 9/11 SYR4 2012–2019
Bromodichloromethane
3.2 µg/L
No EPA limit set
 8/11 SYR4 2012–2019
Combined Uranium
17 µg/L 57%
of the EPA limit 30 µg/L
 5/5 SYR4 2012–2014
Barium
50 µg/L 2.5%
of the EPA limit 2000 µg/L
 4/6 SYR4 2012–2015
Dichloroacetic Acid
5.16 µg/L
No EPA limit set
 4/4 SYR4 2016–2019
Gross Alpha, Excl. Radon And U
2.3 pCi/L 15%
of the EPA limit 15 pCi/L
 4/5 SYR4 2012–2014
Trichloroacetic Acid
4.23 µg/L
No EPA limit set
 4/4 SYR4 2016–2019
Combined Radium (-226 And -228)
0.5000 pCi/L 10%
of the EPA limit 5 pCi/L
 3/3 SYR4 2012
Monochloroacetic Acid
0.9000 µg/L
No EPA limit set
 3/4 SYR4 2016–2019
Nitrate-Nitrite
160 µg/L 1.6%
of the EPA limit 10000 µg/L
 3/4 SYR4 2012–2014
Dibromoacetic Acid
0.7500 µg/L
No EPA limit set
 1/4 SYR4 2016–2019
Dibromochloromethane
0.9600 µg/L
No EPA limit set
 1/11 SYR4 2012–2019
Diquat
0.3000 µg/L 1.5%
of the EPA limit 20 µg/L
 1/7 SYR4 2012–2017
Monobromoacetic Acid
0.8900 µg/L
No EPA limit set
 1/4 SYR4 2016–2019
Nitrite
9.3 µg/L 0.9%
of the EPA limit 1000 µg/L
 1/4 SYR4 2012–2014
87 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, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
LOEBACH, RYAN
Phone
970-920-5110
Email
ryan.loebach@aspen.gov

Frequently asked questions about Aspen City of

Is Aspen City of tap water safe to drink?

EPA monitoring detected 20 contaminants in Aspen 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 Aspen City of's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Nitrate, Fluoride, Lead, and others. The full list with the level and data source for each is above.

How many people does Aspen City of serve?

Aspen City of reports serving 31,100 people in Colorado, per its EPA record.

Has Aspen City of had any water quality violations?

The EPA has 214 violations on file for Aspen City 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.