Johnson, KS: High Radon Risk — 40/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Across water systems in Johnson, EPA data shows a below-average compliance pattern for KS — health-based violations are on file in several areas, and checking the specific system serving your address is a practical first step for concerned residents.
How Johnson Compares
Data: EPA SDWIS Last verified: 2026-06-03
Johnson Water: The Quick Version
- Homes built before 1986: 66% — older plumbing may contain lead solder.
- Estimated remediation: $1,200 per household.
- CDC health risk index: 14.21 — above typical levels.
Water Systems Serving Johnson
The structure of water supply in Johnson, KS is straightforward: one utility provides the bulk of residential service among 1 tracked system, concentrating rate-setting and infrastructure decisions under a single organization.
Overview
We track water quality and home safety data for 1 ZIP code in Johnson, Kansas, covering 1 community water system serving approximately 1,835 people.
No EPA violations recorded across any ZIP codes in Johnson — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Johnson: D (40/100)
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
Johnson water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Johnson
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 67855 | D | MANTER, CITY OF | 127 |
All ZIP Codes in Johnson
- 67855 [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 Johnson
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 Johnson's Housing Stock?
With 66% 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
Because the majority of Johnson's housing predates 1986, when lead solder was banned from new plumbing, the median build year of 1960 reflects a city where lead-era plumbing materials are common rather than exceptional.
Over half of homes in Johnson were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Johnson: Remediation Cost in Perspective
The equity-to-remediation ratio in Johnson is moderate — worth planning for but within reach for most property owners.
Remediation costs are moderate relative to home values in Johnson. The estimated $800–$1,500 range is manageable for most homeowners but still worth budgeting for. Home values are 57% below the Kansas average.
Protecting Children from Lead in Johnson
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.
Routinely in Johnson, where 66% of housing predates the solder ban and aggregate utility readings hover near the federal threshold, a faucet-level draw functions as a standard household step for families with small kids.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Johnson
- 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 66% 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 Johnson, KS