A84/100
Green Valley Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 1,275 residents · California
What's In Green Valley's Tap Water?
1
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
2
Violations (last 5yr)
2
Unresolved
1
Health-Related
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 2Unresolved
Treatment technique violation
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
Water Utility Details
GREEN VALLEY CWD
Population Served
1,275
Water Source
Groundwater
System ID
CA1910244
Frequently Asked Questions About Green Valley Water
Is Green Valley tap water safe to drink?
Green Valley, California tap water receives a grade of A (84/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA maximum contaminant levels (MCLs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Green Valley's water?
1 contaminants were tested in Green Valley's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Green Valley have any water quality violations?
Yes, Green Valley has 4 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MCL. 3 of these are health-based violations, which are the most serious category.
Do I need a water filter in Green Valley?
Green Valley water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. All contaminants are within health goals.
Where does Green Valley's tap water come from?
Green Valley's drinking water is sourced from groundwater and supplied by GREEN VALLEY CWD. The system serves approximately 1,275 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Green Valley's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Green Valley's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Green Valley's water compare to other cities in California?
Green Valley's water quality score of 84/100 earns a grade of A, which is considered excellent. This places Green Valley among the better-performing water systems in California. Visit our California state page to see how all cities in the state compare.
What should I do if I'm concerned about Green Valley's water quality?
If you have concerns about Green Valley's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (GREEN VALLEY CWD) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.