Overland Park, KS: High Radon Risk — 46/100 (2026)
13 ZIP codes · 2 water systems · Updated 2026-06-03
Monitoring data across Overland Park reveals a persistent pattern of below-average compliance in KS — multiple service areas carry documented health violations, and the data has shown little overall improvement over recent EPA reporting cycles.
How Overland Park Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Overland Park, KS
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Distribution of water safety grades across Overland Park.
Overland Park Water: The Quick Version
- Homes built before 1986: 42% — older plumbing may contain lead solder.
- Estimated remediation: $2,515 per household.
- CDC health risk index: 10.83.
Water Systems Serving Overland Park
Across Overland Park, KS, residential water comes from 2 primary utilities rather than a single consolidated provider. Each system operates independently — managing its own distribution infrastructure, rate schedules, and EPA compliance filings. Federal records track 2 water systems in the area, with these top providers accounting for the majority of residential connections.
Overview
We track water quality and home safety data for 13 ZIP codes in Overland Park, Kansas (population ~191,173), covering 2 community water systems serving approximately 625,014 people region-wide.
No EPA violations recorded across any ZIP codes in Overland Park — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Overland Park: D (46/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Overland Park water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Overland Park
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 13 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 66204 | D | WATER DISTRICT 1 OF JOHNSON CO | 482,000 |
| 66207 | D | WATER DISTRICT 1 OF JOHNSON CO | 482,000 |
| 66210 | D | Water District 1 of Johnson Company | 482,000 |
| 66212 | D | Water District 1 of Johnson Company | 482,000 |
| 66213 | D | Water District 1 of Johnson Company | 482,000 |
| 66214 | D | Water District 1 of Johnson Company | 482,000 |
| 66221 | D | Water District 1 of Johnson Company | 482,000 |
| 66223 | D | Water District 1 of Johnson Company | 482,000 |
| 66224 | D | Water District 1 of Johnson Company | 482,000 |
| 66225 | D | OLATHE, CITY OF | 143,014 |
All ZIP Codes in Overland Park
- 66204 [D]
- 66207 [D]
- 66210 [D]
- 66212 [D]
- 66213 [D]
- 66214 [D]
- 66221 [D]
- 66223 [D]
- 66224 [D]
- 66225 [D]
- 66251 [D]
- 66282 [D]
- 66283 [D]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
CDC Health Data for Overland Park
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
How Old Is Overland Park's Housing Stock?
With 42% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
When trying to understand water quality at the household level, the year a home was built often matters more than any city-wide water report. That's because the 1986 federal ban on lead solder in plumbing, and the earlier phase-out of lead pipes before 1970, created sharp discontinuities in residential plumbing risk by construction era. Overland Park's median build year of 1986 puts the city in the transition zone: a substantial share of the housing stock postdates the solder ban, but a comparable fraction predates it — with the oldest homes carrying both the solder risk and the pipe risk simultaneously. Whether any individual household sits on the safer or riskier side of these thresholds is the key question, and it's one the city-wide median alone can't answer.
Most homes in Overland Park were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Overland Park: Remediation Cost in Perspective
Given current Overland Park valuations, the remediation-to-property-value ratio is low — most homeowners are looking at a proportionally modest share that fits within routine financial planning.
Remediation costs in Overland Park are relatively low compared to home values. The $1,654–$3,492 estimated range is a small fraction of median property value. Home values are 164% above the Kansas average.
Protecting Children from Lead in Overland Park
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
In recent monitoring under the Lead and Copper Rule, citywide samples for Overland Park have approached or crossed the regulatory action level on multiple occasions. Combined with 42% of stock dating from the pre-rule era, the picture supports baseline single-tap reads as a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Overland Park
How does Overland Park's flood record connect to local water quality? The NFIP documents 386 claims — enough to signal recurring events — and 77% of ZIP codes carry FEMA flood zone status. That combination places flooding in the category of factors that can periodically affect water infrastructure, even if the area isn't among the highest-exposure communities in the NFIP dataset.
Overland Park has a moderate flood history with 386 FEMA claims averaging $4,752 per payout. 77% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,515</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Overland Park
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 42% of homes built before 1986, lead solder is a real possibility.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Overland Park, KS