Knox Water Works
EPA ID: PA6160005 · 1,380 people served · 7 ZIP codes
The five-year EPA compliance file for Knox Water Works contains 4 violations, each documented and subsequently closed — the utility now operates in full compliance and continues to supply approximately 1,380 residents with water meeting current federal standards, including both health-based and monitoring requirements.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Knox Water Works Source: EPA SDWIS service area boundaries.
Service area boundary — Grade D
Service Area Demographics
The Knox Water Works serves a community with a median household income of $58,583 and an estimated 10,923 residents across its service area. Approximately 74% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 46% 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?
Knox Water Works'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 2% of homes in Clarion County, Pennsylvania rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Knox Water Works compares to EPA limits
What This Means For You
Contaminant 0700 at 3 mg/L exceeds the EPA maximum of mg/L.
Comparable Water Systems
Similar-sized systems in Pennsylvania
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
KNOX WATER WORKS (EPA ID: PA6160005) is a community water system in Pennsylvania that serves approximately 1,380 people from groundwater sources.
This system provides water to 7 ZIP codes across 7 communities.
Average Home Safety Score: D (47/100)
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 |
|---|---|---|---|
| August 1, 2024 | Contaminant 0700 | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Contaminant 0700 | Other Violation | 3 | No |
| Copper | Inorganic | 1 | No |
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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: 2 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 5 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.
- 16221 — Curllsville
- 16232 — Knox
- 16234 — Limestone
- 16254 — Shippenville
- 16331 — Kossuth
- 16373 — Emlenton
- 16375 — Lamartine
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Knox Water Works (PA6160005) on EPA.gov.
Frequently Asked Questions
Is Knox Water Works water safe to drink?
Knox Water Works has only monitoring/reporting violations, which are procedural in nature. The system meets federal health-based standards.
How many people does Knox Water Works serve?
Knox Water Works serves approximately 1,380 people across 7 ZIP codes in Pennsylvania.
Where does Knox Water Works get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
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
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
Knox Water Works (EPA ID: PA6160005) — request the latest Consumer Confidence Report or ask about specific contaminants.