A82/100
ARIZONA WATER CO - TIERRA GRANDE — Water Quality Report 2026
Serving 1,796 people · Arizona
Water Source
Groundwater
County
—
System ID
AZ0411076
Violations
14
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 - TIERRA GRANDE
Is ARIZONA WATER CO - TIERRA GRANDE water safe to drink?
ARIZONA WATER CO - TIERRA GRANDE water receives a grade of A (82/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has ARIZONA WATER CO - TIERRA GRANDE detected?
1 contaminants were tested in ARIZONA WATER CO - TIERRA GRANDE's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does ARIZONA WATER CO - TIERRA GRANDE have any EPA violations?
Yes, ARIZONA WATER CO - TIERRA GRANDE has 14 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MR. 1 are health-based violations.
How many people does ARIZONA WATER CO - TIERRA GRANDE serve?
ARIZONA WATER CO - TIERRA GRANDE serves approximately 1,796 people, Arizona. The system provides water to 1 community: Casa Grande.
What type of water does ARIZONA WATER CO - TIERRA GRANDE provide?
ARIZONA WATER CO - TIERRA GRANDE sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is AZ0411076.
How does ARIZONA WATER CO - TIERRA GRANDE compare to other utilities in Arizona?
ARIZONA WATER CO - TIERRA GRANDE scores 82/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Arizona state page for a full comparison of water systems.