F14/100
ARIZONA WATER CO - SIERRA VISTA — Water Quality Report 2026
Serving 9,175 people · Arizona
Water Source
Groundwater
County
—
System ID
AZ0402004
Violations
78
Contaminant Test Results
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
1
Health-Related
TIER 3Resolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024 – November 13, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – November 13, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About ARIZONA WATER CO - SIERRA VISTA
Is ARIZONA WATER CO - SIERRA VISTA water safe to drink?
ARIZONA WATER CO - SIERRA VISTA water receives a grade of F (14/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 78 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has ARIZONA WATER CO - SIERRA VISTA detected?
31 contaminants were tested in ARIZONA WATER CO - SIERRA VISTA's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does ARIZONA WATER CO - SIERRA VISTA have any EPA violations?
Yes, ARIZONA WATER CO - SIERRA VISTA has 78 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MR. 2 are health-based violations.
How many people does ARIZONA WATER CO - SIERRA VISTA serve?
ARIZONA WATER CO - SIERRA VISTA serves approximately 9,175 people, Arizona. The system provides water to 1 community: Sierra Vista.
What type of water does ARIZONA WATER CO - SIERRA VISTA provide?
ARIZONA WATER CO - SIERRA VISTA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is AZ0402004.
How does ARIZONA WATER CO - SIERRA VISTA compare to other utilities in Arizona?
ARIZONA WATER CO - SIERRA VISTA scores 14/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Arizona state page for a full comparison of water systems.