waterbycounty
EPA SDWIS

Sumner County Water Quality

Sumner County, Kansas

Water Grade

F

Water Score

17.2

Violations

38

State Rank

#71

of 105 (1 = best)

EPA SDWIS Compliance

Drinking Water Quality

Water Quality Grade

F

Based on EPA compliance history and violation data

Water Score

17.2/100

Higher = better quality

Health Violations

38

Health-based violations

Violation Rate

160.5%

Systems with violations

Water Advisory: Sumner County

Water Verdict

Sumner County receives a poor water quality assessment with a grade of F and a score of 17.2 out of 100. The water supply has documented quality issues. Residents are strongly encouraged to use filtered or bottled water for drinking and to stay informed about utility improvement plans.

Violation Context

Sumner County has recorded 38 health-based violations, indicating multiple instances where federal contaminant limits or treatment requirements were not met. At 160.5 violations per 1,000 residents, this rate is high and signals significant water quality management issues.

Consumer Guidance

Residents of Sumner County are advised to use filtered or bottled water for drinking and cooking until water quality improves. A reverse-osmosis or activated-carbon filter certified to remove the contaminants listed in the utility's Consumer Confidence Report is recommended. With 38 recorded health violations, staying informed about utility communications and boil-water notices is especially important. For long-term peace of mind, request your utility's latest Consumer Confidence Report and consider independent water testing if you have specific health concerns.

Regional Context

Sumner County has poorer water quality than the average county in Kansas. Its water score is 25.4 points lower than the state average, suggesting more challenges with contamination control or infrastructure than neighboring counties.

Past 5 years

Water Quality Monitoring

Monitoring Sites

2

Active in the past 5 years

Measurements Recorded

40

40 total readings

Most Measured

  • Physical
  • Nutrient
  • Inorganics, Major, Metals

Categories measured most frequently

Data from the EPA Water Quality Portal (WQP), aggregating monitoring records from federal, state, and tribal sources. Each measurement represents a single sample analyzed for a specific characteristic (e.g., E. coli, pH, dissolved oxygen, nitrogen).

Live USGS Streamgage

River & Stream Conditions

Current Discharge

456cfs

May 14, 6:45 PM UTC

vs Long-Term Average

26%

Well below typical

Primary Streamgage

ARKANSAS R ON HWY 160 AT OXFORD, KS

USGS site
07145600
Drainage area
43,801 sq mi
Long-term mean
1,762 cfs

One representative streamgage (the one with the largest drainage area in the county). Many counties have multiple gauges — this view summarizes the primary one. The long-term mean is the full-record annual average; "% of typical" compares the latest reading against that average.

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Frequently Asked Questions

What is the water quality in Sumner County, Kansas?
Sumner County, Kansas has a drinking-water quality grade of F with a score of 17.2/100, based on EPA SDWIS compliance data. The county has 38 health-based drinking water violations over the past 5 years. Watershed health, monitoring records, and live streamflow are reported separately on this page.
Are there any water violations in Sumner County?
Sumner County has 38 health-based drinking water violations recorded by the EPA over the past 5 years. Health-based violations indicate instances where contaminant levels exceeded EPA Maximum Contaminant Levels (MCLs). Violations may have been resolved — check with your local water utility for current status.
How much water-quality monitoring happens in Sumner County?
EPA's Water Quality Portal records 40 measurements from 2 monitoring sites in Sumner County over the past five years. The most frequently measured characteristic groups are Physical, Nutrient, Inorganics, Major, Metals. Each measurement is a single sample analyzed for one characteristic (E. coli, pH, dissolved oxygen, etc.). High monitoring density means more scientific evidence behind any reported signal — it does not by itself indicate water quality.
What's happening with rivers in Sumner County right now?
Sumner County's primary USGS streamgage on the ARKANSAS R ON HWY 160 is currently reading 456 cubic feet per second — 26% of the long-term mean of 1,762.45 cfs. This is well below typical — often a signal of drought stress on source water. For genuine real-time data, visit waterdata.usgs.gov.
How does Sumner County water compare to the Kansas average?
Sumner County's SDWIS water quality score of 17.2/100 is lower than the Kansas state average of 42.6. The average water quality grade across Kansas is D, based on data from 105 counties with available SDWIS data.
Is tap water safe to drink in Sumner County?
Based on EPA SDWIS data, Sumner County has a water quality grade of F (17.2/100). This indicates below-average compliance with significant violations. Residents may want to consider home water filtration or independent testing. The grade speaks to the public water system, not the watershed — for watershed-level concerns, see the Watershed Health zone. For the most up-to-date information, contact your local water utility or review your Consumer Confidence Report (CCR).
Why does Sumner County have so many water violations?
Sumner County has 38 health-based drinking water violations on record from the EPA SDWIS database. A higher violation count can result from aging infrastructure, underfunded water utilities, agricultural runoff contamination, or industrial pollution. Counties with more water systems may also see more violations simply due to scale. Residents concerned about water quality should consider independent water testing and home filtration systems.
How does Sumner County rank for water quality in Kansas?
Sumner County ranks #71 out of 105 counties in Kansas by SDWIS water quality score (1 = best). With a score of 17.2/100, it falls in the bottom third of counties statewide. The ranking reflects EPA SDWIS compliance only — not watershed impairment, monitoring density, or streamflow, which are tracked separately on this page.

Counties with Similar Water Quality

Stafford County

Kansas

F

17.8

Water score

Reno County

Kansas

F

15.8

Water score

Ellsworth County

Kansas

F

15.6

Water score

Data Sources

Drinking-water compliance data from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.

Water-quality monitoring counts from the EPA Water Quality Portal (WQP) — federated USGS, EPA, and state agency sampling records over a rolling 5-year window.

Live streamflow from the USGS National Water Information System (NWIS) — continuous discharge measurements from the largest-drainage gauge in each county, compared against the full-record long-term annual mean.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

By Logan Johnson, Founder & Data EditorUpdated Reviewed by Logan Johnson, Founder & Data Editor

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