ZipCheckup grade for 66621: B.

This ZIP has a few items worth a quick check.

Your top priority: use a filter certified to reduce PFAS; check which ones. Check your ZIP → EPA PFAS info

Water Quality Report

Topeka, KS (66621): PFAS Detected in Mapped Water Systems - 83/100

EPA data for City of Topeka

PFAS Detected

EPA records for the water systems mapped to 66621 in Topeka, KS contain 2 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 0 are marked health-based.

Data source: U.S. Environmental Protection Agency (EPA) SDWIS

Based on EPA Drinking Water FEMA Flood Data U.S. Census CDC Energy Information Admin. USGS Water Data & 9 more federal sources

Latest air quality, EPA records and weather alerts Current data temporarily unavailable

Current EPA violation data unavailable

Safety Score

B 83/100

Water Quality Concerns 2 non-health-based violation records in EPA data

Lead Risk Below action level 0.0024 mg/L, 90th percentile, sample period ending 2023-12-31

NFIP Claim History N/A

Data confidence: High (direct measurement) Medium (sampled / sub-geography) Low (modeled / inferred) Methodology →

At a Glance

Water EPA records for water systems mapped to this ZIP show 2 violations (non-health) (since 2021).
Lead The reported 90th-percentile lead result of 0.0024 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
PFAS PFAS detected in UCMR5 sampling; see the PFAS section for each compound, compared with the federal PFAS MCL where one exists.
Radon EPA Zone 2 - county-level radon potential, not a home measurement.

Contaminant Summary

Violations on record (not health-based)

2 violations PFAS detected

Report data assembled: Jul 27, 2026 EPA water-system identity: source date or period is not present in ZipCheckup's accepted source record EPA violation history: more than two update cycles old Lead, copper and UCMR measurements: source date or period is not present in ZipCheckup's accepted source record Consumer Confidence Report: source date or period is not present in ZipCheckup's accepted source record

ZIP-level Home Safety model score: 83 / 100

Home Safety Score higher than 67% of ZIP codes nationwide

Water System

125,963

People Served

Health Violations (since 2021)

Surface water

Water Source

0.0024 mg/L

Reported Lead Result

Zone 2

County Radon Potential · Moderate

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This report sorts findings for 66621 in Topeka into two severity tiers using its own criteria: lead above the EPA action level, unresolved violations on record or a PFAS result above the level of an EPA PFAS maximum contaminant level (enforced from 2029) for the critical tier, and a PFAS detection or elevated carbon monoxide risk for the high-priority tier. In the available data, the high-priority tier holds 1 and the critical tier hold none; each card below describes one finding.

PFAS Detected in Water Supply HIGH

PFAS ("forever chemicals") have been detected in water systems serving this ZIP code. Highest level: 0.0051 µg/L.

What to do: Consider a water filter rated for PFAS reduction (NSF/ANSI 53 or 58). See PFAS Contamination below ↓ ↓

Score Breakdown

Overall Home Safety Score: 83/100

This is the published model score. Component and domain values are shown independently; they are not added together on this page.

Canonical components

EPA water compliance

96/100

Observed

PFAS MCL screen

100/100

Observed

EPA radon zone

50/100

Observed

Annual EPA AirData AQI

100/100

Observed

Required domains

Drinking water

98/100

Indoor environment

50/100

Outdoor environment

100/100

Coverage: 4 of 4 components and 3 of 3 domains observed.

Model 4.0.0; series home-safety-v4-cross-vertical.

Safety & Health (8) HIGH

Your Water System

ZIP code 66621 in Topeka, Kansas is mapped to the water system City of Topeka (EPA ID: KS2017701). This system provides water to approximately 125,963 people from surface water sources.

Other Water Quality Reports in Kansas

66002 (Atchison) - 18 violations recorded for mapped water systems
66006 (Baldwin City) - 6 violations recorded for mapped water systems
66007 (Basehor) - 5 violations recorded for mapped water systems
66008 (Bendena) - 7 violations recorded for mapped water systems
66010 (Blue Mound)
66012 (Bonner Springs) - 13 violations recorded for mapped water systems
66013 (Bucyrus) - 5 violations recorded for mapped water systems
66014 (Centerville) - 14 violations recorded for mapped water systems
66015 (Colony) - 1 violation recorded for mapped water systems
66016 (Cummings)
66017 (Denton)
66018 (De Soto) - 6 violations recorded for mapped water systems
66019 (Clearview City)
66020 (Easton) - 6 violations recorded for mapped water systems
66021 (Edgerton) - 7 violations recorded for mapped water systems
66023 (Effingham)
66024 (Elwood) - 11 violations recorded for mapped water systems
66025 (Eudora) - 10 violations recorded for mapped water systems
66026 (Fontana) - 34 violations recorded for mapped water systems
66027 (Fort Leavenworth)

Nearby Water Quality Reports

66628 (Topeka) - <1 mi
66604 (Topeka) - 1 mi - 10 violations recorded for mapped water systems
66612 (Topeka) - 1 mi - 2 violations recorded for mapped water systems
66611 (Topeka) - 1 mi - 2 violations recorded for mapped water systems
66601 (Topeka) - 2 mi
66625 (Topeka) - 2 mi
66626 (Topeka) - 2 mi
66629 (Topeka) - 2 mi
66636 (Topeka) - 2 mi
66683 (Topeka) - 2 mi

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for City of Topeka (KS2017701) on EPA.gov.

5 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.

📊 EPA Safe Drinking Water · View source →

PFAS Contamination Detected

PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 66621.

Detected compounds: PFBA.

Highest measured level: 0.0051 µg/L

Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.

Learn about PFAS risks → Find a PFAS filter →

📊 EPA UCMR5 · View source →

Environmental Hazards (9) MODERATE

Home & Infrastructure (2) OK

Cost & Community (6) OK

CPSC product recall notices

These national notices are not matched to this ZIP code or water system.

View all recalls →

📊 CPSC · View source →

Frequently Asked Questions

Is the tap water in 66621 safe to drink?

EPA SDWIS records 2 violations since 2021 across the water systems mapped to ZIP 66621 (primary system: City of Topeka), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.

Where does 66621's water come from?

The recorded water source for City of Topeka, a system mapped to ZIP code 66621, is Surface water. This system serves approximately 125,963 people.

How does Topeka water compare to the national average?

Topeka's Home Safety Score ranks better than 67% of U.S. ZIP codes, and at or above 80% within Kansas.

How can I get my water tested in Topeka?

If City of Topeka supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.

Is lead a concern in 66621 tap water?

The Lead and Copper Rule record selected for 66621 reports a 90th-percentile lead result of 0.0024 mg/L for a water system mapped to this ZIP (record date 2023-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.

What is the radon risk for 66621?

66621 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in Shawnee County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.

Are there PFAS (forever chemicals) in 66621's water?

Yes, PFAS have been detected in samples from water systems mapped to 66621. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.

How to cite this page

APA

ZipCheckup. (2026). Topeka, KS (66621): PFAS Detected in Mapped Water Systems - 83/100. https://zipcheckup.com/report/66621/

BibTeX

@misc{zipcheckup-report-66621,
  author = {{ZipCheckup}},
  title  = {{Topeka, KS (66621): PFAS Detected in Mapped Water Systems - 83/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/66621/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 66621

ZIP Code	City, State	Distance	Grade	Violations
66628	Topeka, KS	<1 mi	N/A	0
66604	Topeka, KS	1.0 mi	B	10
66612	Topeka, KS	1.2 mi	B	2
66611	Topeka, KS	1.3 mi	B	2
66601	Topeka, KS	1.6 mi	N/A	0
66625	Topeka, KS	1.6 mi	N/A	0
66626	Topeka, KS	1.6 mi	N/A	0
66629	Topeka, KS	1.6 mi	N/A	0
66636	Topeka, KS	1.6 mi	N/A	0
66683	Topeka, KS	1.6 mi	N/A	0