B68/100
GREEN VALLEY MWC — Water Quality Report 2026
Serving 2,993 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA3610023
Violations
8
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.73 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.025 mg/L | 0.015 mg/L | Over Limit |
EPA Violation History
2
Violations (last 5yr)
1
Unresolved
1
Health-Related
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
TIER 3Resolved
Failed to conduct Level 1 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: February 1, 2023 – March 1, 2023Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
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 GREEN VALLEY MWC
Is GREEN VALLEY MWC water safe to drink?
GREEN VALLEY MWC water receives a grade of B (68/100), which is considered good. Out of 2 contaminants tested, 2 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has GREEN VALLEY MWC detected?
2 contaminants were tested in GREEN VALLEY MWC's water. Notable contaminants include Lead (90th percentile), Copper (90th percentile). 2 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does GREEN VALLEY MWC have any EPA violations?
Yes, GREEN VALLEY MWC has 8 EPA violation(s) on record, with the most recent in 2024. Violation types include MCL, MR. 2 are health-based violations.
How many people does GREEN VALLEY MWC serve?
GREEN VALLEY MWC serves approximately 2,993 people, California.
What type of water does GREEN VALLEY MWC provide?
GREEN VALLEY MWC 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 CA3610023.
How does GREEN VALLEY MWC compare to other utilities in California?
GREEN VALLEY MWC scores 68/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our California state page for a full comparison of water systems.