C46/100
Greater Santa Rosa Regional — Water Quality Report 2026
Serving 1,623 people · Arizona
Water Source
Groundwater
County
—
System ID
090400226
Violations
43
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | < 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2017.
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 Greater Santa Rosa Regional
Is Greater Santa Rosa Regional water safe to drink?
Greater Santa Rosa Regional water receives a grade of C (46/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 43 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has Greater Santa Rosa Regional detected?
1 contaminants were tested in Greater Santa Rosa Regional's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does Greater Santa Rosa Regional have any EPA violations?
Yes, Greater Santa Rosa Regional has 43 EPA violation(s) on record, with the most recent in 2017. Violation types include MR, MCL. 2 are health-based violations.
How many people does Greater Santa Rosa Regional serve?
Greater Santa Rosa Regional serves approximately 1,623 people, Arizona. The system provides water to 1 community: Sr Boarding School, Sr Subdivision, Palo.
What type of water does Greater Santa Rosa Regional provide?
Greater Santa Rosa Regional sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is 090400226.
How does Greater Santa Rosa Regional compare to other utilities in Arizona?
Greater Santa Rosa Regional scores 46/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Arizona state page for a full comparison of water systems.