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Tap water quality report

Ft Collins City of

EPA monitoring tested this supplier for 106 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

106
contaminants tested
14
detected
179,901
people served
4
health-based violations
Colorado rankingsLead in ColoradoPFAS in Colorado
Water source
Surface water
Ownership
Local government
Counties served
Larimer

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.

4
health-based violations
61
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2017-12-01 → 2017-12-31
TT Health-based Resolved 2017-12-01 → 2017-12-31
TT Health-based Resolved 2017-12-01 → 2017-12-31
TT Health-based Resolved 2017-12-01 → 2017-12-31
MR Monitoring Resolved 2026-04-01 → 2026-04-30
MR Monitoring Resolved 2026-04-01 → 2026-04-30
MR Monitoring Resolved 2026-04-01 → 2026-04-30
MR Monitoring Resolved 2026-03-01 → 2026-03-31
MR Monitoring Resolved 2026-03-01 → 2026-03-31
MR Monitoring Resolved 2026-03-01 → 2026-03-31

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 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
TTHM
46.084 µg/L 58%
of the EPA limit 80 µg/L
worst single sample: 64.2 µg/L
252/252 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
35 µg/L 58%
of the EPA limit 60 µg/L
worst single sample: 43 µg/L
251/252 SYR4 2012–2019
Chlorite
330 µg/L 33%
of the EPA limit 1000 µg/L
worst single sample: 490 µg/L
209/210 SYR4 2012–2019
Dichloroacetic Acid
14 µg/L
No EPA limit set
worst single sample: 18 µg/L
120/120 SYR4 2015–2019
Trichloroacetic Acid
14 µg/L
No EPA limit set
worst single sample: 15 µg/L
120/120 SYR4 2015–2019
Chloroform
31.521 µg/L
No EPA limit set
worst single sample: 31.9 µg/L
27/27 SYR4 2012–2019
Bromodichloromethane
3.8 µg/L
No EPA limit set
worst single sample: 3.85 µg/L
26/26 SYR4 2012–2019
Fluoride
860 µg/L 22%
of the EPA limit 4000 µg/L
worst single sample: 880 µg/L
24/24 SYR4 2012–2019
Lead
0.0028 mg/L 19%
of the EPA limit 0.0150 mg/L
 20/20 LCR 2025
Nitrate
98 µg/L 1%
of the EPA limit 10000 µg/L
 14/16 SYR4 2012–2019
Barium
19.39 µg/L 1%
of the EPA limit 2000 µg/L
worst single sample: 19.6 µg/L
8/8 SYR4 2012–2019
Nitrate-Nitrite
95.6 µg/L 1%
of the EPA limit 10000 µg/L
worst single sample: 98 µg/L
7/8 SYR4 2012–2019
Monochloroacetic Acid
2.1 µg/L
No EPA limit set
 1/120 SYR4 2015–2019
Selenium
1.3 µg/L 2.6%
of the EPA limit 50 µg/L
 1/8 SYR4 2012–2019
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-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
STONECIPHER, GREGG
Phone
970-217-3514
Email
[email protected]

Frequently asked questions about Ft Collins City of

Is Ft Collins City of tap water safe to drink?

EPA monitoring detected 14 contaminants in Ft Collins 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 Ft Collins City of's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Chlorite, Dichloroacetic Acid, Trichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Ft Collins City of serve?

Ft Collins City of reports serving 179,901 people in Colorado, per its EPA record.

Has Ft Collins City of had any water quality violations?

The EPA has 61 violations on file for Ft Collins 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.