Fields Hill Improvement Association
EPA ID: IL0995150 · 312 people served · 1 ZIP code
Five clean years on EPA record — Fields Hill Improvement Association, 312 residents served.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 3 (2023) to 1 (2025). The pattern suggests growing compliance challenges.
Service Area Demographics
The Fields Hill Improvement Association serves a community with a median household income of $77,562 and an estimated 23,999 residents across its service area. Approximately 77% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Fields Hill Improvement Association's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 1% of homes in LaSalle County, Illinois rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Wastewater Proximity Note: This service area ranks in the 80th percentile nationally for proximity to wastewater discharge points.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Illinois
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
Fields Hill Improvement Association (EPA ID: IL0995150) is a community water system in Illinois that serves approximately 312 people from groundwater sources.
This system serves ZIP code 61350 in Ottawa.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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
- 61350 — Ottawa
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Fields Hill Improvement Association (IL0995150) on EPA.gov.
Frequently Asked Questions
Is Fields Hill Improvement Association water safe to drink?
Based on EPA records, Fields Hill Improvement Association has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Fields Hill Improvement Association serve?
Fields Hill Improvement Association serves approximately 312 people across 1 ZIP code in Illinois.
Where does Fields Hill Improvement Association get its water?
The primary water source is groundwater.