Is Kansas, OK Tap Water Safe to Drink?
Graded D, with 19 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
49/100
waterverge.com Kansas, OK — Water Quality Report
Kansas's drinking water received a grade of D (49 out of 100), indicating poor water quality. The city's 3 water systems serve approximately 2,329 residents using surface water.
Lead levels were measured at 1.8 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 237 violations on record, including 7 health-based violations. 19 remain unresolved.
What to know about Kansas's water
Kansas ranks #236 out of 358 cities in Oklahoma for water quality, placing it below average in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
As a small community water system, Kansas may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 135 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Kansas, OK water safe to drink?
Kansas's drinking water has significant quality concerns based on EPA testing data. With a grade of D (49/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 3 water systems serve approximately 2,329 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Kansas
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Kansas's water quality assessment. Grade: D (49/100).
Contaminants: Endothall, Glyphosate, OXAMYL.
Contaminants: Endrin, BHC-GAMMA, Diquat.
3 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
Federal disaster declaration (FEMA DR-1754). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3219). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Kansas's water supply.
Well within EPA limits.
Violation history
Kansas's water system has 237 total violations on record, including 7 health-based violations. 19 remain unresolved. 135 violations were issued in the last 5 years.
Flood & environmental risk
Delaware County has experienced 4 federally declared disasters since 1974. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Spavinaw Creek Near Colcord, Saline Creek Near Bull Hollow, Flint Creek Near Kansas, Illinois River At Chewey.
Where does Kansas's water come from?
Kansas's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 3 water systems serving approximately 2,329 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Spavinaw Creek Near Colcord (river), Saline Creek Near Bull Hollow (river), Flint Creek Near Kansas (river), Illinois River At Chewey (river).
What Kansas residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Kansas's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Kansas's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Drought conditions
D1 — moderate droughtDelaware County is currently in D1 (moderate drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Delaware County has experienced 4 federally declared disasters since 1974. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 1.8 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Kansas compares by contaminant
Explore where Kansas ranks among all Oklahoma cities for specific contaminants.
Water source & infrastructure
Where Kansas's water comes from
Kansas's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by private ownership and serves approximately 2,329 people through 3 water systems.
Water bodies near Kansas
Kansas is located near 4 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Kansas
| System Name | PWSID | Population | Source |
|---|---|---|---|
| SOUTH DELAWARE CO REGIONAL WATER AUTH. | OK1221645 | 1,500 | SW |
| KANSAS PUBLIC WORKS AUTHORITY | OK2002135 | 802 | SWP |
| ADAIR CO RWS & SWMD #6 | OK2000145 | 27 | GW |
How Kansas compares
Full Oklahoma rankings →Kansas's score of 49/100 is on par with the average of 45/100 among major Oklahoma cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Oklahoma rankings →About Kansas, OK
Wikipedia →Kansas is a town in Delaware County, Oklahoma, United States. The population was 711 at the 2020 census and an estimated 744 in 2023.
Learn more about your water
Guides and resources related to Kansas's water quality findings.
Explore water quality across Delaware
Frequently asked questions
Is Kansas, OK tap water safe to drink?
Kansas's water quality earned a grade of D (49/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #236 out of 358 cities tested in Oklahoma.
What contaminants are in Kansas's water?
Lead was measured at 1.8 ppb (90th percentile). 237 violations are on record.
How is Kansas's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Kansas?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Kansas's water come from?
Kansas's water is sourced from Surface water. The city has 3 water systems serving approximately 2,329 residents.
What health violations has Kansas's water system had?
Kansas has 7 health-based violations on record. The most recent violation was recorded in July 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 19 violations remain unresolved.
How does Kansas's water compare to other cities?
Kansas ranks #236 out of 358 cities in Oklahoma (better than 34% of state cities) and #13344 out of 15744 cities nationally (15th percentile). The grade of D reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.