Grass Valley, California: Is the Tap Water Safe to Drink?

2026 EPA water quality data for 29 community water systems serving 77,213+ residents. See violations, PFAS results, lead test results, and safety grades — free.

Is Grass Valley Tap Water Safe to Drink?

28 of 29 tested water systems in Grass Valley meet federal drinking water standards with no active violations. 1 system has 1 active health-based violation — check individual reports below for details.

Grass Valley Water Quality Overview

Grass Valley, California is served by 29 community water systems providing water to approximately 77,213 residents. These systems draw from groundwater (22), surface water (7) sources. 1 active health-based violation across Grass Valley water systems require attention. Including monitoring and reporting violations, there are 53 total violations on record.

Water Systems

Health Violations

28/29

Rated A or B

💧 Filter Guide 📖 Violations Explained 📄 Read Your CCR

Find Your Water System

Search by ZIP code to find your exact water provider and see its full EPA report.

All 29 water systems in Grass Valley

NEVADA ID - E. GEORGE, BANNER MOUNTAIN A

GRASS VALLEY, CA · 17,154 people · Surface Water ✓ No recent health violations

CALTRANS-MAXWELL RESTSTOPS A

GRASS VALLEY, CA · 15,000 people · Groundwater ✓ No recent health violations

NEVADA ID - LOMA RICA A

GRASS VALLEY, CA · 14,072 people · Surface Water ✓ No recent health violations

NEVADA ID - LAKE WILDWOOD A

GRASS VALLEY, CA · 9,108 people · Surface Water ✓ No recent health violations

NEVADA ID - LAKE OF PINES A

GRASS VALLEY, CA · 6,870 people · Surface Water ✓ No recent health violations

NEVADA ID - NORTH AUBURN A

GRASS VALLEY, CA · 6,870 people · Surface Water ✓ No recent health violations

CITY OF GRASS VALLEY A

GRASS VALLEY, CA · 4,947 people · Surface Water ✓ No recent health violations

MOTHER TRUCKERS WATER SYSTEM A

GRASS VALLEY, CA · 450 people · Groundwater ✓ No recent health violations

TNF-ASPEN CREEK/PASS CREEK A

GRASS VALLEY, CA · 300 people · Groundwater ✓ No recent health violations

WOOD CAMP - WATER SYSTEM A

GRASS VALLEY, CA · 281 people · Groundwater ✓ No recent health violations

NID SCOTTS FLAT LAKE RESERVOIR A

GRASS VALLEY, CA · 253 people · Groundwater ✓ No recent health violations

PLEASANT RIDGE SCHOOL A

GRASS VALLEY, CA · 250 people · Groundwater ✓ No recent health violations

SIERRA CITY WATER WORKS, INC. A

GRASS VALLEY, CA · 250 people · Groundwater ✓ No recent health violations

PENINSULA CAMPGROUND WATER SYSTEM A

GRASS VALLEY, CA · 202 people · Groundwater ✓ No recent health violations

ROLLINS LAKE RESORT, LONG RAVINE A

GRASS VALLEY, CA · 161 people · Groundwater ✓ No recent health violations

CLEAR CREEK SCHOOL A

GRASS VALLEY, CA · 160 people · Groundwater ✓ No recent health violations

DONNER MINE CAMP INC A

GRASS VALLEY, CA · 151 people · Groundwater ✓ No recent health violations

NEVADA ID - SMARTSVILLE A

GRASS VALLEY, CA · 122 people · Surface Water ✓ No recent health violations

NAGGIAR VINEYARDS A

GRASS VALLEY, CA · 109 people · Groundwater ✓ No recent health violations

HEAUSER'S PLAZA CENTER A

GRASS VALLEY, CA · 100 people · Groundwater ✓ No recent health violations

BETHEL CHURCH A

GRASS VALLEY, CA · 75 people · Groundwater ✓ No recent health violations

WOLF MOUNTAIN CONF. ASSN. A

GRASS VALLEY, CA · 74 people · Groundwater ✓ No recent health violations

DEW DROP INN A

GRASS VALLEY, CA · 50 people · Groundwater ✓ No recent health violations

DOLLAR GENERAL STORE - WEED A

GRASS VALLEY, CA · 50 people · Groundwater ✓ No recent health violations

CHRISTIAN ENCOUNTER MINISTRIES A

GRASS VALLEY, CA · 35 people · Groundwater ✓ No recent health violations

ROLLINS LAKESIDE RESORT A

GRASS VALLEY, CA · 35 people · Groundwater ✓ No recent health violations

ANIMAL PLACE A

GRASS VALLEY, CA · 30 people · Groundwater ✓ No recent health violations

SIVANANDA YOGA FARM A

GRASS VALLEY, CA · 29 people · Groundwater ✓ No recent health violations

NCSOS, MCCOURTNEY RD. F

GRASS VALLEY, CA · 25 people · Groundwater ⚠ 1 active health violation

Looking for water quality data across the whole state? See our full California tap water safety report covering California’s EPA-regulated water systems.

Grass Valley Drinking Water: Frequently Asked Questions

Is Grass Valley, California tap water safe to drink?

How many water utilities serve Grass Valley, California?

29 community water systems serve Grass Valley, California, providing water to approximately 77,213 people. Different neighborhoods may be served by different utilities. Enter your ZIP code at the top to find your specific provider.

Does Grass Valley tap water have lead?

Lead in drinking water typically enters from old pipes and fixtures inside homes and buildings, not from the treatment plant. The EPA requires water systems to monitor for lead under the Lead and Copper Rule. Click any water system above to see its most recent 90th-percentile lead test results. Homes built before 1986 are most likely to have lead plumbing components.

What contaminants have been found in Grass Valley drinking water?

EPA violation records for Grass Valley water systems are listed on each utility's report page. Common regulated contaminants include disinfection byproducts (TTHMs, HAA5), coliform bacteria, nitrates, and lead. Click any utility above to see its full violation history going back 10 years.

How do I find out which water company serves my address in Grass Valley?

Enter your Grass Valley ZIP code in the search box at the top of this page. ClearWater will identify the specific water system serving your area and show you its EPA violation history, lead test results, and an overall safety grade. You can also check your water bill or your utility's annual Consumer Confidence Report (CCR).