Summit County Service Area #3
What EPA’s and Utah’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.
- Serves
- 1,140 people
- Connections
- 229
- Water source
- Groundwater
- Based in
- Park City, UT
- County
- Summit
- Owner
- Local government
- Hardness
- Varies by source
The ZIP code it serves
The short answer
1 result is above the limit’s level with no violation recorded, and 1 more is above the health goal. The worst: Arsenic, above the limit’s level, no violation. No health-based violations on file since 2016.
What handles itWhat was found
Arsenic, uranium, nitrate, fluoride and chromium (total): Utah’s own results, samples taken from Jan. 31, 2020 to Aug. 31, 2026, with EPA’s 2012 to 2019 file for earlier years.
Above the limit’s level, no violation recorded1
Arsenic
Comes from the source
11ppb
Highest yearly average, 2020 to 2026
2026 average: 10.3 ppb
Averaged by year, the highest was 11 ppb, in 2023, above EPA’s legal limit of 10 ppb. Its highest single sample was 28.8 ppb. In 2026, the latest year on file, its 19 samples averaged 10.3 ppb. EPA judges this limit on running averages at each sampling point, and recorded no violation for arsenic at this utility since 2020. Results like these with no violation often include water sampled before treatment or blending; the utility’s annual report says what reaches the tap. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 10.2 ppb, in 2013, and EPA recorded a violation in 2012.
What handles it
- NSF/ANSI 58 look for “Arsenic (Pentavalent)<=50 ppb Reduction”
- NSF/ANSI 53 look for “Arsenic (Pentavalent)<=50 ppb Reduction”
Above the health goal1
Uranium
Comes from the source
3.6ppb
Highest yearly average, 2024 to 2025
Averaged by year, the highest was 3.6 ppb, in 2025: below EPA’s legal limit of 30 ppb, but above its health goal of zero. That was also the latest year on file.
What handles it
- NSF/ANSI 58 look for “Uranium”
Below EPA’s limits2
Nitrate
Comes from the source
2.2ppm
Highest sample; found in 14 of 14
2026 average: 1.3 ppm
The highest sample, in 2026, was 2.2 ppm, below EPA’s legal limit of 10 ppm. That was also the latest year on file, and its four samples averaged 1.3 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 2.0 ppm, in 2016.
What handles it
- NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
- NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
Fluoride
Forms or is added in treatment
0.53ppm
Highest yearly average, 2020 to 2026
2026 average: 0.33 ppm
Averaged by year, the highest was 0.53 ppm, in 2023, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.69 ppm. In 2026, the latest year on file, its two samples averaged 0.33 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.6 ppm, in 2013.
What handles it
- NSF/ANSI 58 look for “Fluoride Reduction”
- NSF/ANSI 53 look for “Fluoride”
2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
- Chromium (total)
- Lead
What handles it
A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”
- NSF/ANSI 53
Claim: Arsenic (Pentavalent)<=50 ppb Reduction
For: Arsenic
Other certifiers’ wording: Arsenic (III) (50 ppb influent level)
- NSF/ANSI 58
Claims: Arsenic (Pentavalent)<=50 ppb Reduction, Uranium
For: Arsenic, Uranium
Other certifiers’ wording: Arsenic (Pentavalent)<=300 ppb Reduction; Arsenic (V) (300 ppb influent level)
At the tap, or for the whole house?
These come with the water itself, so a whole-house system certified for the same claims treats every tap and shower. A filter at the tap treats drinking water for much less. How whole-house systems compare.
Filters with those claims on a certifier’s listing
Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money
Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic
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
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
Hardness
Soft to very hard depending on the source, 30 to 273 mg/L (1.7 to 16 grains per gallon), across 2 sampling points, 2018 to 2024.
Hardness is calcium and magnesium. EPA sets no limit for it: it shows up as scale on fixtures and in water heaters, and as soap that won’t lather. USGS calls water above 60 mg/L moderately hard, above 120 hard and above 180 very hard.
Violations since 2016
No health-based violations on file with EPA since 2016. There are 18 monitoring or reporting violations: a sample missed, late or not reported.
What this report can’t tell you
Everything else. Arsenic, uranium, nitrate, fluoride and chromium (total) results here are Utah’s own from 2020 on, with EPA’s national file for 2012 to 2019. Summit County Service Area #3’s own annual report, which it must send you every year, has the contaminants this page does not show.
Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.
Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; Utah’s results run from Jan. 31, 2020 to Aug. 31, 2026.
Testing your own tap
The 3 labs Utah certifies closest to the area Summit County Service Area #3 serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Summit County Health Department Laboratory
Coalville, UT · about 15 miles
Certified for bacteria, nitrate, minerals and other inorganics
Jordanelle Laboratory
Heber City, UT · about 16 miles
Certified for bacteria
Wasatch County Health Department
Heber City, UT · about 17 miles
Certified for bacteria
Sources
- EPA UCMR 5 occurrence data, file of Oct. 15, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q3
- Utah Department of Environmental Quality, Division of Drinking Water, results from Jan. 3, 2020 to Oct. 1, 2026, read Oct. 8, 2026
- EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
- Certified labs: Utah Department of Environmental Quality, Division of Drinking Water, certified laboratories, read Oct. 10, 2026; distances from the Census 2020 ZIP code tabulation area gazetteer
- Hardness: Utah Department of Environmental Quality, Division of Drinking Water, results from Aug. 9, 2018 to Sept. 17, 2024, read Oct. 10, 2026
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.
PWSID UTAH22105. Rebuilt from EPA data on Oct. 18, 2026.
What to do next
- Read up on the 2 results above a lineWhat each one does to health, where it comes from, and the certification claim that addresses it.Start with Arsenic
- Get the utility’s own reportSummit County Service Area #3 must send you a water quality report every year. It covers contaminants this page does not show.How to read it
- Test your own tap for leadYour service line, solder and fixtures decide the lead at your faucet, not the utility’s average.Lead in your water: what to do
- Compare certified filtersWhat the filters certified for these results cost over five years, cartridges included.Compare five-year costs