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Sedalia WSD

What EPA’s and Colorado’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
215 people
Connections
103
Water source
Groundwater influenced by surface water
Based in
Lakewood, CO
County
Douglas
Owner
Local government
The ZIP code it serves

80135

The short answer

Nothing in EPA’s and Colorado’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 1.6 ppm, for the period ending June 30, 1994. None since is on file, so it is not counted as a current finding.

Nitrate, fluoride, total trihalomethanes (TTHM), chromium (total), haloacetic acids (HAA5), arsenic and uranium: Colorado’s own results, samples taken from March 4, 2020 to Aug. 20, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits5

Nitrate

Comes from the source

Below EPA’s limits

5.4ppm

Highest sample; found in 2 of 26

2026: not found

The highest sample, in 2021, was 5.4 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, it wasn’t found in any of its four samples. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 2.6 ppm, in 2018.

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

Below EPA’s limits

1.5ppm

Highest yearly average, 2020 to 2022

2022, one sample: 1.4 ppm

Averaged by year, the highest was 1.5 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. In 2022, the latest year on file, its one sample was 1.4 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.5 ppm, in 2013.

What handles it

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

3.9ppb

Highest yearly average, 2020 to 2026

2026, one sample: 1.5 ppb

Averaged by year, the highest was 3.9 ppb, in 2024, below EPA’s legal limit of 80 ppb. In 2026, the latest year on file, its one sample was 1.5 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 14.4 ppb, in 2017.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Chromium (total)

Comes from the source

Below EPA’s limits

2.0ppb

Highest yearly average, 2020 to 2022

Averaged by year, the highest was 2.0 ppb, in 2022, below EPA’s legal limit of 100 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.0 ppb, in 2019.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

1.2ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 1.2 ppb, in 2024, below EPA’s legal limit of 60 ppb. In 2026, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 3.8 ppb, in 2014.

What handles it

No certification claim covers this compound yet.

3 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Lead
  • Uranium

Violations since 2016

No health-based violations on file with EPA since 2016. There are 40 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Nitrate, fluoride, total trihalomethanes (TTHM), chromium (total), haloacetic acids (HAA5), arsenic and uranium results here are Colorado’s own from 2020 on, with EPA’s national file for 2012 to 2019. Sedalia WSD’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; Colorado’s results run from March 4, 2020 to Aug. 20, 2026.

Testing your own tap

Sedalia WSD’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 Colorado certifies.

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

  • GeoWater Services

    Evergreen, CO · about 30 miles

    Certified for bacteria

  • El Paso County Health Department

    Colorado Springs, CO · about 31 miles

    Certified for bacteria, nitrate, minerals and other inorganics

  • Colorado Department of Health & Environment

    Denver, CO · about 35 miles

    Certified for bacteria

All 54 certified labs for Colorado

Sources

PWSID CO0118060. Rebuilt from EPA data on Oct. 18, 2026.

Also in Douglas County

All Colorado utilities

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