Grassy Knob Subordinate Sd
EPA ID: ART001101 · 88 people served · 4 ZIP codes
Five years of EPA monitoring have produced no violations for Grassy Knob Subordinate Sd — the supplier serving 88 residents has kept every contaminant level within federal limits, a result that places it among the top-performing utilities for systems with a service population of comparable size.
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 1 (2021) to 14 (2023). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Grassy Knob Subordinate Sd Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Grassy Knob Subordinate Sd serves a community with a median household income of $60,232 and an estimated 114,403 residents across its service area.
Environmental Justice Note: 38% 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?
Grassy Knob Subordinate Sd'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.
About 1% of homes in Washington County, Arkansas rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Arkansas
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
Grassy Knob Subordinate Sd (EPA ID: ART001101) is a community water system in Arkansas that serves approximately 88 people from surface water sources.
This system provides water to 4 ZIP codes across 1 community.
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
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Grassy Knob Subordinate Sd (ART001101) on EPA.gov.
Frequently Asked Questions
Is Grassy Knob Subordinate Sd water safe to drink?
Based on EPA records, Grassy Knob Subordinate Sd has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Grassy Knob Subordinate Sd serve?
Grassy Knob Subordinate Sd serves approximately 88 people across 4 ZIP codes in Arkansas.
Where does Grassy Knob Subordinate Sd get its water?
The primary water source is surface water.
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.