Water District 1 of Johnson Company
EPA ID: KS2009110 · 490,000 people served · 32 ZIP codes
ZipCheckup's reading of EPA records for Water District 1 of Johnson Company (KS2009110): no drinking-water violations recorded since 2021. Checked against the EPA violation database, Water District 1 of Johnson Company returns no entries for its service territory of 490,000 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Water District 1 of Johnson Company Source: EPA SDWIS service area boundaries.
Service area boundary - average Home Safety grade of mapped ZIPs: C
Demographics of ZIP Codes Served
The ZIP codes associated with Water District 1 of Johnson Company have a median household income of $110,662 and about 617,983 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 43% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Water District 1 of Johnson Company's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 69th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 34 detections recorded.
Comparable Water Systems
Similar-sized systems in Kansas
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Water District 1 of Johnson Company (EPA ID: KS2009110) is a community water system in Kansas that serves approximately 490,000 people from surface water sources.
This system provides water to 32 ZIP codes across 12 communities.
ZIP-Area Home Safety Context: C (67/100)
This is the average Home Safety Score for 26 of 32 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0065 mg/L | No | 2023-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
30 of 32 ZIP records with known zones are in EPA Radon Zone 1. 2 of 32 ZIP records with known zones are in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by KS or modeled from parcel and building-footprint data.
This system serves 32 ZIP codes:
66013 · 66018 · 66030 · 66061 · 66062 66083 · 66085 · 66202 · 66203 · 66204 66205 · 66206 · 66207 · 66208 · 66209 66210 · 66211 · 66212 · 66213 · 66214 66215 · 66216 · 66217 · 66218 · 66219 66220 · 66221 · 66223 · 66224 · 66226 66227 · 66251
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Water District 1 of Johnson Company (KS2009110) on EPA.gov.
Frequently Asked Questions
Is Water District 1 of Johnson Company water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Water District 1 of Johnson Company in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Water District 1 of Johnson Company serve?
Water District 1 of Johnson Company serves approximately 490,000 people across 32 ZIP codes in Kansas.
Where does Water District 1 of Johnson Company get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected; the table compares each one with the EPA MCL where one exists (April 2024 rule, compliance required from 2029) and with this state's enforceable standard where one exists.
EPA's April 2024 PFAS rule sets MCLs of 4 ppt for PFOA and PFOS and 10 ppt for PFHxS, PFNA and HFPO-DA (GenX); water systems must comply from 2029. Other PFAS compounds have no individual federal MCL. A state standard is shown only where this system's state has its own enforceable PFAS limit. Detection results are EPA UCMR5 samples, not a measurement at your tap.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Water District 1 of Johnson Company, KS: Serves 490K People. https://zipcheckup.com/water-system/ks2009110/
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title = {{Water District 1 of Johnson Company, KS: Serves 490K People}},
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url = {https://zipcheckup.com/water-system/ks2009110/}
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What You Can Do
Test your water
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Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Water District 1 of Johnson Company (EPA ID: KS2009110) - request the latest Consumer Confidence Report or ask about specific contaminants.