← Colorado

Tap water quality report

East Larimer County Wd

EPA monitoring tested this supplier for 43 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

43
contaminants tested
11
detected
27,944
people served
3
health-based violations
Water source
SWP
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.

3
health-based violations
39
violations on file
2
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2012-10-01 → 2012-10-31
MCL Health-based Resolved 2012-10-01 → 2012-10-31
MCL Health-based Resolved 2012-10-01 → 2012-10-31
MR Monitoring Unaddressed 2026-01-01
MR Monitoring Unaddressed 2026-01-01
Other Monitoring Resolved 2022-07-30
Other Monitoring Resolved 2022-07-30
Other Monitoring Resolved 2022-07-01
Other Monitoring Resolved 2022-07-01
Other Monitoring Resolved 2022-07-01

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
52.6 µg/L 66%
of the EPA limit 80 µg/L
worst single sample: 56.3 µg/L
105/105 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
35.88 µg/L 60%
of the EPA limit 60 µg/L
worst single sample: 38.2 µg/L
105/105 SYR4 2012–2019
Bromodichloromethane
5.98 µg/L
No EPA limit set
worst single sample: 6.6 µg/L
69/69 SYR4 2015–2019
Chloroform
44.18 µg/L
No EPA limit set
worst single sample: 46.9 µg/L
69/69 SYR4 2015–2019
Dichloroacetic Acid
17.9 µg/L
No EPA limit set
worst single sample: 21.3 µg/L
69/69 SYR4 2015–2019
Trichloroacetic Acid
16.965 µg/L
No EPA limit set
worst single sample: 19.2 µg/L
68/69 SYR4 2015–2019
Chlorite
570 µg/L 57%
of the EPA limit 1000 µg/L
worst single sample: 580 µg/L
36/36 SYR4 2017–2019
Monochloroacetic Acid
4.34 µg/L
No EPA limit set
worst single sample: 5.2 µg/L
34/69 SYR4 2015–2019
Dibromochloromethane
0.7625 µg/L
No EPA limit set
worst single sample: 0.8900 µg/L
18/69 SYR4 2015–2019
Lead
0.0039 mg/L 26%
of the EPA limit 0.0150 mg/L
12/12 LCR 2025
Monobromoacetic Acid
1.2 µg/L
No EPA limit set
1/69 SYR4 2015–2019
32 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaBromoformDibromoacetic AcidHfpo-DaNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
SIDDENS, RANDY
Phone
970-493-2044
Email
[email protected]

Frequently asked questions about East Larimer County Wd

Is East Larimer County Wd tap water safe to drink?

EPA monitoring detected 11 contaminants in East Larimer County Wd'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 East Larimer County Wd's water?

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

How many people does East Larimer County Wd serve?

East Larimer County Wd reports serving 27,944 people in Colorado, per its EPA record.

Has East Larimer County Wd had any water quality violations?

The EPA has 39 violations on file for East Larimer County Wd, of which 3 are health-based (a contaminant limit or required treatment was breached) and 2 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.