A100/100
JOINT REGIONAL WATER SUPPLY SYSTEM — Water Quality Report 2026
Serving 3,947 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA3010071
Violations
0
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
This system has a clean compliance history.
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 JOINT REGIONAL WATER SUPPLY SYSTEM
Is JOINT REGIONAL WATER SUPPLY SYSTEM water safe to drink?
JOINT REGIONAL WATER SUPPLY SYSTEM water receives a grade of A (100/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has JOINT REGIONAL WATER SUPPLY SYSTEM detected?
1 contaminants were tested in JOINT REGIONAL WATER SUPPLY SYSTEM's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does JOINT REGIONAL WATER SUPPLY SYSTEM have any EPA violations?
No, JOINT REGIONAL WATER SUPPLY SYSTEM has zero EPA violations on record. This indicates consistent compliance with federal drinking water standards.
How many people does JOINT REGIONAL WATER SUPPLY SYSTEM serve?
JOINT REGIONAL WATER SUPPLY SYSTEM serves approximately 3,947 people, California.
What type of water does JOINT REGIONAL WATER SUPPLY SYSTEM provide?
JOINT REGIONAL WATER SUPPLY SYSTEM sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA3010071.
How does JOINT REGIONAL WATER SUPPLY SYSTEM compare to other utilities in California?
JOINT REGIONAL WATER SUPPLY SYSTEM scores 100/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our California state page for a full comparison of water systems.