Hidden Hollow Mhc
EPA ID: AZ0403362 · 400 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Hidden Hollow Mhc (AZ0403362): 1 unresolved EPA violation on record. Hidden Hollow Mhc carries 1 open EPA violation that remain unresolved in the federal system - approximately 400 people fall within its service area.
Data: EPA SDWIS
Service Area Map
Coverage area for Hidden Hollow Mhc Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Hidden Hollow Mhc serves a community with a median household income of $62,587 and an estimated 36,900 residents across its service area.
Environmental Justice Note: 39% 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?
Hidden Hollow Mhc'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.
Wastewater Proximity Note: This service area ranks in the 60th percentile nationally for proximity to wastewater discharge points.
Infrastructure Risk
Detected Contaminants
How Hidden Hollow Mhc compares to EPA limits
What This Means For You
Consumer Confidence Report Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
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
Hidden Hollow Mhc (EPA ID: AZ0403362) is a community water system in Arizona that serves approximately 400 people from groundwater sources.
This system serves ZIP code 86001 in Flagstaff.
Violation History
Status breakdown for accepted records with record years 2021-2026: 3 resolved, 0 archived, 0 addressed, and 1 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| September 8, 2024 | Stage 1 DBP Rule | Non-health-based | Resolved |
| June 1, 2024 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| October 1, 2022 | Barium | Non-health-based | Resolved |
| August 23, 2021 | Consumer Confidence Report Rule | Health-based | Unaddressed (current) |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting Failure | 2 | Yes |
| Barium | Inorganic | 1 | No |
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 mg/L | No | N/A |
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: 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 AZ or modeled from parcel and building-footprint data.
- 86001 - Flagstaff
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Hidden Hollow Mhc (AZ0403362) on EPA.gov.
Frequently Asked Questions
Is Hidden Hollow Mhc water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current health-based noncompliance record for Hidden Hollow Mhc. Review the utility's current notices and EPA record. This system-level compliance history cannot determine conditions at a specific tap.
How many people does Hidden Hollow Mhc serve?
Hidden Hollow Mhc serves approximately 400 people across 1 ZIP code in Arizona.
Where does Hidden Hollow Mhc get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Hidden Hollow Mhc (AZ): 1 Health Violation. https://zipcheckup.com/water-system/az0403362/
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author = {{ZipCheckup}},
title = {{Hidden Hollow Mhc (AZ): 1 Health Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/az0403362/}
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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
Hidden Hollow Mhc (EPA ID: AZ0403362) - request the latest Consumer Confidence Report or ask about specific contaminants.