B
74

Good Water Quality

Baldwin City, KS 66006

Douglas County · Population served: 7,882 · Data updated March 2026

Water Systems Serving This Area

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DOUGLAS CO RWD 4
Surface water · Pop. 3,000
PWSID: KS2004509
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BALDWIN CITY, CITY OF
Surface water · Pop. 4,882
PWSID: KS2004510

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
4.0
15 ppb 1 ppb Warning

Violation History (Last 5 Years)

7Total (5yr)
0Health-Based
6Major

Water Quality Summary

Understanding Your Water in Baldwin City

Tap water quality in Baldwin City, Kansas (66006) receives an overall grade of B (Good) with a score of 74 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is roughly in line with the Kansas state average of 75. The area is served by 2 water systems providing water to approximately 7,882 people, using surface water sources. Testing has found elevated levels of Lead that warrant attention.

Your Score 74/100 B
vs State 1 pts below Kansas avg (75)
vs National 1 pts below national avg (75)

What a Grade B Means

A score of 74/100 means the water in Baldwin City, KS is generally good and meets EPA standards, with only minor areas of concern. There may be low levels of detectable contaminants or a small number of non-critical violations. Most residents can feel comfortable with their tap water quality, though basic filtration can provide an extra layer of protection.

Surface water: sourced from rivers, lakes, or reservoirs

Health Information

What These Contaminants Mean for You

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Lead in Your Water

Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.

Health Effects

Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.

Common Sources

Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.

What You Can Do

If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.

Common Questions

Frequently Asked Questions

Based on EPA data, tap water in Baldwin City, Kansas receives a grade of B (Good) with a score of 74/100. This indicates the water meets federal standards and has relatively few concerns. However, individual homes may still have localized issues such as lead from old plumbing.

ZIP code 66006 is served by 2 water systems using surface water sources, providing water to approximately 7,882 people. Surface water systems are more susceptible to contamination from agricultural runoff, industrial discharge, and weather events, but typically undergo more extensive treatment including filtration and disinfection.

Lead was detected at 4.0 ppb in Baldwin City, Kansas. While this is below the EPA action level of 15 ppb, it exceeds the health guideline of 1 ppb recommended by health organizations. Consider a certified lead filter, especially if you have young children.

No PFAS ("forever chemicals") were detected in water systems serving Baldwin City, Kansas during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Baldwin City, Kansas have received 7 violations in the last 5 years. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Based on detected contaminants (lead), residents in Baldwin City, Kansas should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

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