Grass Valley
Is Grass Valley tap water safe to drink?
Mostly yes — Grass Valley scores 98/100. This report aggregates EPA drinking water data across 6 local systems in Grass Valley. We found 4 total violations (3 unresolved).
Real-Time Environment
Live: 03:00 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Grass Valley.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Grass Valley?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Filter requirements and certified reduction benchmarks for Grass Valley tap water.
Baby Formula Safety
Infant formula preparation risks, nitrate levels, and lead pipe guidance in Grass Valley.
Homebuyer's Perspective
Evaluating water infrastructure in Grass Valley protects plumbing and helps estimate water heater longevity. The high safety score (98/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Lead (90th percentile) levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Compliance Record for Grass Valley
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Grass Valley.
Frequently Asked Questions
Is Grass Valley tap water safe to drink?
Mostly yes — Grass Valley scores 98/100.
How many water systems serve Grass Valley?
Grass Valley is served by 6 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Grass Valley?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Grass Valley.
What is the water quality score for Grass Valley?
The water quality score for Grass Valley is 98 out of 100, based on EPA contaminant data, violation history, and testing results across the 6 systems serving the city.
What are the top contaminants in Grass Valley?
The top contaminants detected in Grass Valley include Lead (90th percentile). View detailed information on our contaminants page.
Grass Valley Water Quality Summary
Grass Valley, CA receives a water quality score of 98/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 6 public water systems serving the area.
Grass Valley's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.
Grass Valley's score of 98 is 9 points above the California state average of 89, and above the nationwide average of roughly 78/100 across all U.S. states.
Several distinct water systems supply Grass Valley, successfully managing complex aquifer geology and agricultural runoff of the West Coast region to deliver clean tap water. For home buyers and residents of this mid-size California city, this exemplary performance offers verified regulatory compliance regarding local tap water quality. The community's water infrastructure consistently maintains top-tier standards, demonstrating that even in a region shaped by Central Valley agriculture and large urban centers, local water remains highly reliable.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our California water quality rankings report →
Key Contaminants
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Water Systems Serving Grass Valley (6)
Nevada Id - North Auburn
ANevada Id - E. George, Banner Mountain
ANevada Id - Loma Rica
ANevada Id - Lake Of Pines
ANevada Id - Lake Wildwood
ACity Of Grass Valley
ACheck Your Specific Address
Water quality can vary by neighborhood in Grass Valley.
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Compare Grass Valley water quality: View all states · Contaminant library · How we score water quality