City of Oswego
EPA ID: KS2009908 · 1,680 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for City of Oswego (KS2009908): 1 past health-based violation, since resolved. Although 4 violations appeared on City of Oswego's record, all have been remedied - currently compliant, 1,680 served.
Data: EPA SDWIS
Service Area Map
Coverage area for City of Oswego Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The City of Oswego serves a community with a median household income of $55,833 and an estimated 2,693 residents across its service area. Approximately 80% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 63% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
🌊 Where Does Your Water Come From?
City of Oswego'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.
Infrastructure Risk
Detected Contaminants
How City of Oswego compares to EPA limits
What This Means For You
Contaminant 1009 at 1 mg/L exceeds the EPA maximum of 0.004 mg/L. Intestinal damage, bone damage. Consider reverse osmosis filtration.
E. coli at 3 Zero tolerance (any positive sample triggers immediate action) exceeds the EPA maximum of Zero tolerance (any positive sample triggers immediate action). Severe GI illness; potentially fatal kidney failure in children. Consider UV disinfection (99.99%) filtration.
Contaminant 1009 was detected in this water system. reverse osmosis filtration can reduce exposure.
Find a certified water filter →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
City of Oswego, (EPA ID: KS2009908) is a community water system in Kansas that serves approximately 1,680 people from surface water sources.
This system serves ZIP code 67356 in Oswego.
Violation History
Status breakdown for accepted records with record years 2021-2026: 4 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| August 1, 2024 | E. coli | Non-health-based | Resolved |
| January 1, 2024 | E. coli | Non-health-based | Resolved |
| June 1, 2023 | E. coli | Non-health-based | Resolved |
| July 1, 2021 | Contaminant 1009 | Health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| E. coli | Microbiological | 3 | No |
| Contaminant 1009 | Other Violation | 1 | Yes |
Health Risk Details
Beryllium (EPA limit: 0.004 mg/L)
Intestinal damage, bone damage At-risk groups: long-term residents, people with gastrointestinal conditions.
Removal methods: reverse osmosis, activated alumina, coagulation/filtration. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0032 mg/L | No | N/A |
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
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate 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: 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.
- 67356 - Oswego
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Oswego (KS2009908) on EPA.gov.
Frequently Asked Questions
Is City of Oswego water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for City of Oswego; its 4 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does City of Oswego serve?
City of Oswego serves approximately 1,680 people across 1 ZIP code in Kansas.
Where does City of Oswego get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). City of Oswego (KS): 1 Health Violation. https://zipcheckup.com/water-system/ks2009908/
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author = {{ZipCheckup}},
title = {{City of Oswego (KS): 1 Health Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ks2009908/}
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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
City of Oswego (EPA ID: KS2009908) - request the latest Consumer Confidence Report or ask about specific contaminants.