Water District 1 of Johnson Company
EPA ID: KS2009110 · 482,000 people served · 52 ZIP codes
ZipCheckup's reading of EPA SDWIS for Water District 1 of Johnson Company (KS2009110): 1 EPA violation in the last five years. Water District 1 of Johnson Company's record shows 1 remedied violation - all cleared, currently compliant, 482,000 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Water District 1 of Johnson Company Source: EPA SDWIS service area boundaries.
Service area boundary - Grade D
Service Area Demographics
The Water District 1 of Johnson Company serves a community with a median household income of $101,830 and an estimated 785,232 residents across its service area. Approximately 51% 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 68th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Detected Contaminants
How Water District 1 of Johnson Company compares to EPA limits
What This Means For You
Total Trihalomethanes (TTHM) at 1 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 37 detections recorded.
Total Trihalomethanes (TTHM) was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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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 482,000 people from surface water sources.
This system provides water to 52 ZIP codes across 15 communities.
Average Home Safety Score: D (48/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2023 | Total Trihalomethanes (TTHM) | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 1 | No |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 66110 | 0.00648 mg/L | No | N/A |
| 66115 | 0.00648 mg/L | No | N/A |
| 66117 | 0.00648 mg/L | No | N/A |
| 66118 | 0.00648 mg/L | No | N/A |
| 66119 | 0.00648 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 33 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 19 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
This system serves 52 ZIP codes:
66013 · 66018 · 66030 · 66053 · 66061 66062 · 66083 · 66085 · 66101 · 66102 66103 · 66104 · 66105 · 66106 · 66109 66110 · 66111 · 66112 · 66113 · 66115 66117 · 66118 · 66119 · 66160 · 66201 66202 · 66203 · 66204 · 66205 · 66206 66207 · 66208 · 66209 · 66210 · 66211 66212 · 66213 · 66214 · 66215 · 66216 66217 · 66218 · 66219 · 66220 · 66221 66222 · 66223 · 66224 · 66226 · 66227 66251 · 66286
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record 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?
Water District 1 of Johnson Company has only monitoring/reporting violations, which are procedural in nature. The system meets federal health-based standards.
How many people does Water District 1 of Johnson Company serve?
Water District 1 of Johnson Company serves approximately 482,000 people across 52 ZIP codes in Kansas.
Where does Water District 1 of Johnson Company get its water?
The primary water source is surface water.
Consumer Confidence Report (CCR)
Every community water system is required to provide an annual Consumer Confidence Report (CCR) to customers. The most recent report is from 2024.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected below the current state-enforceable MCL.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Frequently Asked Questions
How to cite this page
ZipCheckup. (2026). Water District 1 of Johnson Company (KS): 1 EPA Violation. https://zipcheckup.com/water-system/ks2009110/
@misc{zipcheckup-water-system-ks2009110,
author = {{ZipCheckup}},
title = {{Water District 1 of Johnson Company (KS): 1 EPA Violation}},
year = {2026},
url = {https://zipcheckup.com/water-system/ks2009110/}
}
Data as of April 2026.
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
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.