Grannis Waterworks
EPA ID: AR0000437 · 548 people served · 2 ZIP codes
From the earliest to the most recent cycle in the five-year EPA window, Grannis Waterworks has logged zero violations — no MCL exceedances, no health advisories, and no enforcement activity across the entire period for the 548 people in its service area, a record that stands up well against both state and national benchmarks.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 77% chance of violation in next 12 months
Violations went from 1 (2022) to 2 (2023). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Grannis Waterworks Source: EPA SDWIS service area boundaries.
Service area boundary — Grade A
Service Area Demographics
The Grannis Waterworks serves a community with a median household income of $54,040 and an estimated 2,183 residents across its service area. Approximately 65% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 100% 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?
Grannis Waterworks'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 4% of homes in Polk County, Arkansas rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Arkansas
System Overview
Grannis Waterworks (EPA ID: AR0000437) is a community water system in Arkansas that serves approximately 548 people from surface water sources.
This system provides water to 2 ZIP codes across 2 communities.
Average Home Safety Score: A (88/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
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 3 (Low Risk)
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 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 the full compliance record for Grannis Waterworks (AR0000437) on EPA.gov.
Frequently Asked Questions
Is Grannis Waterworks water safe to drink?
Based on EPA records, Grannis Waterworks has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Grannis Waterworks serve?
Grannis Waterworks serves approximately 548 people across 2 ZIP codes in Arkansas.
Where does Grannis Waterworks 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.