Is Rosalia, KS Tap Water Safe to Drink?
Graded B-, with 8 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
73.8/100
waterverge.com Rosalia, KS — Water Quality Report
Rosalia's drinking water received a grade of B- (73.8 out of 100), indicating fair water quality. The city's 2 water systems serve approximately 1,495 residents using purchased surface water.
Lead levels were measured at 6.2 ppb (90th percentile), which is within EPA limits but above recommended levels. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 11 violations on record, including 0 health-based violations. 8 remain unresolved.
What to know about Rosalia's water
Rosalia ranks #219 out of 323 cities in Kansas 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.
While lead levels are within EPA limits, they are above the recommended 5 ppb threshold that health organizations consider ideal. A point-of-use filter adds an extra layer of protection.
As a small community water system, Rosalia may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Rosalia, KS water safe to drink?
Rosalia's drinking water has significant quality concerns based on EPA testing data. With a grade of B- (73.8/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 1,495 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Rosalia
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Rosalia's water quality assessment. Grade: B- (73.8/100).
Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: Lead and Copper Rule.
Contaminants: Lead and Copper Rule.
Federal disaster declaration (FEMA DR-3236). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-588). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Rosalia's water supply.
Within EPA limits but above the American Academy of Pediatrics recommended level of 1 ppb. An NSF 53-certified filter provides additional protection.
Violation history
Rosalia's water system has 11 total violations on record, including 0 health-based violations. 8 remain unresolved. 4 violations were issued in the last 5 years.
Flood & environmental risk
Butler County has experienced 5 federally declared disasters since 1965. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Rosalia's water come from?
Rosalia's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 2 water systems serving approximately 1,495 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Rosalia residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Rosalia'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.
Run cold water for 30 seconds before drinking, especially in the morning. Lead and copper leach from household plumbing when water sits in pipes.
Rosalia'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
Flood & disaster history
Butler County has experienced 5 federally declared disasters since 1965. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Rosalia's water supply, we recommend the following filter types.
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. | 6.2 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Rosalia compares by contaminant
Explore where Rosalia ranks among all Kansas cities for specific contaminants.
Water source & infrastructure
Where Rosalia's water comes from
Rosalia'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 local government ownership and serves approximately 1,495 people through 2 water systems.
Water systems serving Rosalia
| System Name | PWSID | Population | Source |
|---|---|---|---|
| BUTLER CO RWD 3 | KS2001513 | 1,494 | SWP |
| PUBLIC WHOLESALE WSD 8 | KS2001532 | 1 | SWP |
How Rosalia compares
Full Kansas rankings →Rosalia's score of 73.8/100 is above the average of 62/100 among major Kansas cities. It outscores 5 of 10 nearby cities.
Nearby cities
View Kansas rankings →About Rosalia, KS
Wikipedia →Rosalia is an unincorporated community and census-designated place (CDP) in Butler County, Kansas, United States. As of the 2020 census, the population was 149. It is located approximately 12 miles (19 km) east of El Dorado.
Learn more about your water
Guides and resources related to Rosalia's water quality findings.
Explore water quality across Butler
Frequently asked questions
Is Rosalia, KS tap water safe to drink?
Rosalia's water quality earned a grade of B- (73.8/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #219 out of 323 cities tested in Kansas.
What contaminants are in Rosalia's water?
Lead was measured at 6.2 ppb (90th percentile). 11 violations are on record.
How is Rosalia'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 Rosalia?
While lead levels are within EPA limits, a filter adds extra protection. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Rosalia's water come from?
Rosalia's water is sourced from Purchased surface water. The city has 2 water systems serving approximately 1,495 residents.
How does Rosalia's water compare to other cities?
Rosalia ranks #219 out of 323 cities in Kansas (better than 32% of state cities) and #10017 out of 15744 cities nationally (36th percentile). The grade of B- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.