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Tap water quality report

Horizon Mhp

EPA monitoring tested this supplier for 14 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

14
contaminants tested
12
detected
330
people served
1
health-based violations
Wyoming rankingsLead in WyomingPFAS in Wyoming
Water source
SWP
Ownership
Private
Counties served
Sweetwater

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.

1
health-based violations
4
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1991-12-01 → 1991-12-31
MR Monitoring Resolved 2023-10-01
MR Monitoring Archived 1976-07-01 → 1980-06-30
MR Monitoring Archived 1976-07-01 → 1980-06-30

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 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
Copper
580 µg/L 45%
of the EPA limit 1300 µg/L
 10/10 SYR4 2014–2017
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 8/8 LCR 2025
TTHM
55 µg/L 69%
of the EPA limit 80 µg/L
 6/6 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
32 µg/L 53%
of the EPA limit 60 µg/L
 6/6 SYR4 2014–2019
Bromodichloromethane
7.1 µg/L
No EPA limit set
 5/5 SYR4 2014–2019
Chloroform
36 µg/L
No EPA limit set
 5/5 SYR4 2014–2019
Dibromochloromethane
2 µg/L
No EPA limit set
 5/5 SYR4 2014–2019
Dichloroacetic Acid
15 µg/L
No EPA limit set
 5/5 SYR4 2014–2019
Trichloroacetic Acid
20 µg/L
No EPA limit set
 5/5 SYR4 2014–2019
Monochloroacetic Acid
1.7 µg/L
No EPA limit set
 3/5 SYR4 2014–2019
Dibromoacetic Acid
0.4000 µg/L
No EPA limit set
 2/5 SYR4 2014–2019
Lead
5 µg/L 33%
of the EPA limit 15 µg/L
 1/10 SYR4 2014–2017
2 contaminants tested, none detected
BromoformMonobromoacetic Acid

Utility contact

Contact
THOMPSON, CRAIG
Phone
307-389-2715
Email
cthompson@westernwyoming.edu

Frequently asked questions about Horizon Mhp

Is Horizon Mhp tap water safe to drink?

EPA monitoring detected 12 contaminants in Horizon Mhp'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 Horizon Mhp's water?

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

How many people does Horizon Mhp serve?

Horizon Mhp reports serving 330 people in Wyoming, per its EPA record.

Has Horizon Mhp had any water quality violations?

The EPA has 4 violations on file for Horizon Mhp, of which 1 is 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.