Sonoita Valley (south) Water Company
EPA ID: AZ0412005 · 169 people served · 2 ZIP codes
With a five-year violation-free history, Sonoita Valley (south) Water Company delivers safe water to 169 residents.
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 4 (2024) to 1 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Sonoita Valley (south) Water Company Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Sonoita Valley (south) Water Company serves a community with a median household income of $72,273 and an estimated 2,546 residents across its service area. Approximately 46% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 60% 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?
Sonoita Valley (south) Water Company'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 2% of homes in Santa Cruz 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
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
SONOITA VALLEY (SOUTH) WATER COMPANY (EPA ID: AZ0412005) is a community water system in Arizona that serves approximately 169 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
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 Sonoita Valley (south) Water Company (AZ0412005) on EPA.gov.
Frequently Asked Questions
Is Sonoita Valley (south) Water Company water safe to drink?
Based on EPA records, Sonoita Valley (south) Water Company has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Sonoita Valley (south) Water Company serve?
Sonoita Valley (south) Water Company serves approximately 169 people across 2 ZIP codes in Arizona.
Where does Sonoita Valley (south) Water Company get its water?
The primary water source is groundwater.