Estates Inc

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: 1,043 people
Connections: 396
Water source: Groundwater
Based in: Sequim, WA
County: Clallam
Owner: Private

The ZIP code it serves

98382

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

Total trihalomethanes (TTHM), haloacetic acids (HAA5) and nitrate: Washington’s own results, samples taken from Aug. 11, 2020 to Sept. 22, 2026, with EPA’s 2012 to 2019 file for earlier years.

Arsenic, chromium (total) and fluoride: EPA’s compliance monitoring file, samples taken from Aug. 19, 2019 to Aug. 19, 2019. Newer results are in the utility’s annual water quality report.

Below EPA’s limits1

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

6.2ppb

Highest yearly average, 2025 to 2026

2026, one sample: 2.1 ppb

Averaged by year, the highest was 6.2 ppb, in 2025, below EPA’s legal limit of 80 ppb. Its highest single sample was 6.8 ppb. In 2026, the latest year on file, its one sample was 2.1 ppb.

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)
Fluoride
Haloacetic acids (HAA5)
Lead
Nitrate

Violations since 2016

No health-based violations on file with EPA since 2016. There are 2 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5) and nitrate results here are Washington’s own from 2020 on, with EPA’s national file for 2012 to 2019. Arsenic, chromium (total) and fluoride come from EPA’s file alone, which ends in 2019. Estates Inc’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 Aug. 11, 2020 to Sept. 22, 2026; EPA’s compliance samples are from Aug. 19, 2019 to Aug. 19, 2019.

Testing your own tap

Estates Inc’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Washington certifies.

The 3 labs Washington certifies closest to the area Estates Inc serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

Clallam County Environmental Laboratory
Port Angeles, WA · about 14 miles
Certified for bacteria, nitrate
(360) 417-2334
Spectra Laboratories - Kitsap, LLC
Poulsbo, WA · about 29 miles
Certified for bacteria, nitrate, minerals and other inorganics
(360) 779-5141
Eurofins EPK Built Environment Testing, LLC
Seattle, WA · about 41 miles
Certified for bacteria, asbestos
(206) 781-0155