Porter Mountain Dwid
EPA ID: AZ0409024 · 322 people served · 1 ZIP code
Zero EPA violations over five years — Porter Mountain Dwid has kept tap water compliance clean for its full service population of 322.
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 3 (2024). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Porter Mountain Dwid Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Porter Mountain Dwid serves a community with a median household income of $56,837 and an estimated 7,280 residents across its service area. Approximately 50% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 84% 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?
Porter Mountain Dwid'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 11% of homes in Navajo County, Arizona rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 1 detection recorded.
Comparable Water Systems
Similar-sized systems in Arizona
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
Porter Mountain Dwid (EPA ID: AZ0409024) is a community water system in Arizona that serves approximately 322 people from groundwater sources.
This system serves ZIP code 85929 in Lakeside.
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
- 85929 — Lakeside
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Porter Mountain Dwid (AZ0409024) on EPA.gov.
Frequently Asked Questions
Is Porter Mountain Dwid water safe to drink?
Based on EPA records, Porter Mountain Dwid has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Porter Mountain Dwid serve?
Porter Mountain Dwid serves approximately 322 people across 1 ZIP code in Arizona.
Where does Porter Mountain Dwid get its water?
The primary water source is groundwater.