Chautauqua Co RWD 3
What EPA’s and Kansas’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
- 200 people
- Connections
- 65
- Water source
- Surface water bought from another system
- Based in
- Sedan, KS
- County
- Chautauqua
- Owner
- Local government
The ZIP code it serves
The short answer
1 result is above EPA’s legal limit. The worst: Haloacetic acids (HAA5), above the legal limit. 1 health-based violation since 2016.
What was found
Haloacetic acids (HAA5) and total trihalomethanes (TTHM): Kansas’s own results, samples taken from Sept. 7, 2020 to Aug. 25, 2026, with EPA’s 2012 to 2019 file for earlier years.
Above the legal limit1
Haloacetic acids (HAA5)
Forms or is added in treatment
53.9ppb
Highest yearly average, 2020 to 2026
2026 average: 33.9 ppb
Averaged by year, the highest was 53.9 ppb, in 2024, below EPA’s legal limit of 60 ppb. Its highest single sample was 100 ppb. In 2026, the latest year on file, its six samples averaged 33.9 ppb. EPA judges this limit at each sampling point, and recorded a violation for haloacetic acids (HAA5) at this utility in 2025. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 86 ppb, in 2015.
What handles it
No certification claim covers this compound yet.
Below EPA’s limits1
Total trihalomethanes (TTHM)
Forms or is added in treatment
65ppb
Highest yearly average, 2020 to 2026
2026 average: 53.7 ppb
Averaged by year, the highest was 65 ppb, in 2020, below EPA’s legal limit of 80 ppb. Its highest single sample was 85 ppb. In 2026, the latest year on file, its six samples averaged 53.7 ppb. EPA recorded no violation for total trihalomethanes (TTHM) at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 71 ppb, in 2019.
What handles it
- NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
- NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
- Lead
Violations since 2016
| Contaminant or rule | Type | Period | Measured | Status |
|---|---|---|---|---|
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | Jan. 1, 2025 to March 31, 2025 | 0.061 MG/L | Resolved |
| Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. | ||||
What this report can’t tell you
Everything else. Haloacetic acids (HAA5) and total trihalomethanes (TTHM) results here are Kansas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Chautauqua Co RWD 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; Kansas’s results run from Sept. 7, 2020 to Aug. 25, 2026.
Testing your own tap
The lab Kansas certifies closest to the area Chautauqua Co RWD 3 serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Meridian Analytical Laboratory - Wichita
Wichita, KS · about 66 miles
Certified for bacteria, nitrate, minerals and other inorganics, organic chemicals, disinfection byproducts
Sources
- EPA UCMR 5 occurrence data, file of Oct. 15, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q3
- Kansas Department of Health and Environment, Public Water Supply Section, results from Jan. 2, 2020 to Sept. 16, 2026, read Oct. 18, 2026
- EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
- Certified labs: Kansas Department of Health and Environment, drinking water labs, as listed in TNI LAMS, read Oct. 13, 2026; distances from the Census 2020 ZIP code tabulation area gazetteer
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.
PWSID KS2001909. Rebuilt from EPA data on Oct. 18, 2026.
Towns it serves
Also in Chautauqua County
- City of Sedan1,005
- Chautauqua Co RWD 4475
- City of Cedar Vale475
- Chautauqua Co RWD 2278
- Chautauqua Co RWD 1135
- City of Chautauqua110
What to do next
- Read up on Haloacetic acids (HAA5)What each one does to health, where it comes from, and the certification claim that addresses it.About Haloacetic acids (HAA5)
- Get the utility’s own reportChautauqua Co RWD 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
- 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