Is Mountain Green, UT tap water safe?
The short answer
3 of the 3 utilities serving Mountain Green have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Utah’s records: Morgan City Water System, Cottonwood Mutual and Highlands Water Company Inc.
Morgan City Water System, which serves the most people here, has 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 23 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Mountain Green’s ZIP codes, from EPA’s estimates.
- Open report
Morgan City Water System
Utah · serves 4,520 people · under 100 in Mountain Green
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 23 ppb, above EPA’s health benchmark.
1 health-based violation since 2016
- Open report
Cottonwood Mutual
Utah · serves 3,145 people · under 100 in Mountain Green
2 results above the health goal. The worst: Arsenic at 5.3 ppb, above the health goal. Hardness: very hard, 190 mg/L (11.1 grains per gallon).
1 health-based violation since 2016
- Open report
Highlands Water Company Inc
Utah · serves 1,200 people · under 100 in Mountain Green
1 result above the action level and 2 results above the health goal. The worst: Copper at 1.6 ppm, above the action level. Hardness: soft to very hard depending on the source, 18 to 265 mg/L (1.1 to 15.5 grains per gallon).
1 health-based violation since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Morgan City Water System’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic, Lead
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Water testing near Mountain Green
The 3 labs Utah certifies closest to Mountain Green, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Weber Basin Water Quality Laboratory
Layton, UT · about 14 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, disinfection byproducts
Summit County Health Department Laboratory
Coalville, UT · about 16 miles
Certified for bacteria, nitrate, minerals and other inorganics
Davis County Environmental Health Laboratory
Clearfield, UT · about 19 miles
Certified for bacteria, minerals and other inorganics
ZIP codes in Mountain Green
Which ZIP codes are in Mountain Green: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Utah Department of Environmental Quality, Division of Drinking Water, certified laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Mountain Green
Towns nearby with a page of their own.
What to do next
- Read Morgan City Water System’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water