Heafer-black Oak Water Assoc
EPA ID: AR0000427 · 436 people served · 4 ZIP codes
ZipCheckup's reading of EPA records for Heafer-black Oak Water Assoc (AR0000427): no drinking-water violations recorded since 2021. Heafer-black Oak Water Assoc has no EPA violations on record; the utility serves 436 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Heafer-black Oak Water Assoc Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Heafer-black Oak Water Assoc have a median household income of $48,261 and about 5,423 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 56% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 74% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). 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?
Heafer-black Oak Water Assoc's water is classified in EPA records as a groundwater source. 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.
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
Heafer-black Oak Water Assoc (EPA ID: AR0000427) is a community water system in Arkansas that serves approximately 436 people from groundwater sources.
This system provides water to 4 ZIP codes across 4 communities.
Violation History
Lead & Copper
Latest reported 90th-percentile lead result for this PWSID: 0.001 mg/L (2003-12-31).
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
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 AR or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Heafer-black Oak Water Assoc (AR0000427) on EPA.gov.
Frequently Asked Questions
Is Heafer-black Oak Water Assoc water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Heafer-black Oak Water Assoc in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Heafer-black Oak Water Assoc serve?
Heafer-black Oak Water Assoc serves approximately 436 people across 4 ZIP codes in Arkansas.
Where does Heafer-black Oak Water Assoc get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Heafer-black Oak Water Assoc Water Quality Report, AR. https://zipcheckup.com/water-system/ar0000427/
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author = {{ZipCheckup}},
title = {{Heafer-black Oak Water Assoc Water Quality Report, AR}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ar0000427/}
}