Is Peter, UT tap water safe?
The short answer
1 of the 2 utilities serving Peter has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Utah’s records: Willow Creek Water Co.
Mendon City, which serves the most people here, has 3 results above the health goal. The worst: Nitrate at 10.5 ppm, above the health goal. Health goals are stricter than legal limits and are not enforced.
The water from Mendon City is very hard, 226 mg/L (13.2 grains per gallon). How Utah’s water compares.
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 Peter’s ZIP codes, from EPA’s estimates.
- Open report
Mendon City
Utah · serves 1,640 people · about 810 in Peter
3 results above the health goal. The worst: Nitrate at 10.5 ppm, above the health goal. Hardness: very hard, 226 mg/L (13.2 grains per gallon).
No health-based violations since 2016
- Open report
Willow Creek Water Co
Utah · serves 175 people · about 110 in Peter
2 results above the health goal. The worst: Arsenic at 8.0 ppb, above the health goal.
3 health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Mendon City’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: Nitrate, 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: Nitrate, Arsenic, Lead
Culligan 10-Cup Pitcher with ZeroWater Technology (ZEROP10)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Nitrate, Lead
Water testing near Peter
The 3 labs Utah certifies closest to Peter, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Bear River District Health Department Water Laboratory
Logan, UT · about 9 miles
Certified for bacteria, nitrate
Brigham City Laboratory
Brigham City, UT · about 14 miles
Certified for bacteria, minerals and other inorganics
Northrup Grumman Space Systems Environmental Laboratory
Corinne, UT · about 22 miles
Certified for nitrate, lead and copper, metals, minerals and other inorganics
ZIP codes in Peter
Which ZIP codes are in Peter: 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 Peter
Other towns in Cache County with a page of their own.
What to do next
- Read Mendon City’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for NitrateRanked by certification and what they cost over five years.The best reverse osmosis systems, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water