Town of Rockford
What EPA’s and Washington’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
- 570 people
- Connections
- 229
- Water source
- Groundwater
- Based in
- Rockford, WA
- County
- Spokane
- Owner
- Local government
- Hardness
- Moderately hard
The ZIP code it serves
The short answer
Nothing in EPA’s and Washington’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. No health-based violations on file since 2016.
What was found
Copper: EPA’s file records a utility’s copper only when it exceeds the action level. The last here was 1.9 ppm, for the period ending Dec. 31, 2006. None since is on file, so it is not counted as a current finding.
Fluoride, total trihalomethanes (TTHM), arsenic, chromium (total), haloacetic acids (HAA5) and nitrate: Washington’s own results, samples taken from Sept. 1, 2020 to Sept. 1, 2026, with EPA’s 2012 to 2019 file for earlier years.
Uranium: EPA’s compliance monitoring file, samples taken from Oct. 27, 2016 to Oct. 27, 2016. Newer results are in the utility’s annual water quality report.
Below EPA’s limits2
Fluoride
Forms or is added in treatment
0.44ppm
Highest yearly average, 2020
Averaged by year, the highest was 0.44 ppm, in 2020, below EPA’s legal limit of 4.0 ppm. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.57 ppm, in 2016.
What handles it
- NSF/ANSI 58 look for “Fluoride Reduction”
- NSF/ANSI 53 look for “Fluoride”
Total trihalomethanes (TTHM)
Forms or is added in treatment
4.2ppb
Highest yearly average, 2021 to 2025
2025, one sample: 2.1 ppb
Averaged by year, the highest was 4.2 ppb, in 2021, below EPA’s legal limit of 80 ppb. In 2025, the latest year on file, its one sample was 2.1 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.5 ppb, in 2014.
What handles it
- NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
- NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
6 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
- Arsenic
- Chromium (total)
- Haloacetic acids (HAA5)
- Lead
- Nitrate
- Uranium
Hardness
Moderately hard, 116 mg/L (6.8 grains per gallon), at its one sampling point, in 2020.
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 58 monitoring or reporting violations: a sample missed, late or not reported.
What this report can’t tell you
Everything else. Fluoride, total trihalomethanes (TTHM), arsenic, chromium (total), haloacetic acids (HAA5) and nitrate results here are Washington’s own from 2020 on, with EPA’s national file for 2012 to 2019. Uranium comes from EPA’s file alone, which ends in 2019. Town of Rockford’s own annual report, which it must send you every year, has newer results for those and 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; Washington’s results run from Sept. 1, 2020 to Sept. 1, 2026; EPA’s compliance samples are from Oct. 27, 2016 to Oct. 27, 2016.
Testing your own tap
The 3 labs Washington certifies closest to the area Town of Rockford serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Eurofins Spokane
Spokane Valley, WA · about 12 miles
Certified for bacteria, nitrate, minerals and other inorganics
Tshimakain Creek Laboratories
Spokane Valley, WA · about 16 miles
Certified for bacteria, nitrate, minerals and other inorganics
Anatek Labs, Inc - Spokane
Spokane, WA · about 17 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Sources
- EPA UCMR 5 occurrence data, file of Oct. 15, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q3
- Washington State Department of Health, Office of Drinking Water, results from Jan. 1, 2020 to Sept. 29, 2026, read Oct. 8, 2026
- EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
- Certified labs: Washington State Department of Ecology, Lab Accreditation Program, environmental laboratories accredited for drinking water analyses, read Oct. 10, 2026; distances from the Census 2020 ZIP code tabulation area gazetteer
- Hardness: Washington State Department of Health, Office of Drinking Water, results from Sept. 1, 2020 to Sept. 1, 2020, read Oct. 10, 2026
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.
PWSID WA5373550. Rebuilt from EPA data on Oct. 18, 2026.
What to do next
- Nothing here is above a health goalIn EPA’s and Washington’s records for this utility. They don’t cover everything, which is why the next step matters.Every contaminant TapBuff tracks
- Get the utility’s own reportTown of Rockford must send you a water quality report every year. It covers contaminants this page does not show, and has newer results than EPA’s national file for the ones here that come from it.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
- Decide if you want a filter at allA filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.NSF/ANSI standards, decoded