Hanford, California: Is the Tap Water Safe to Drink?
2026 EPA water quality data for 24 community water systems serving 70,293+ residents. See violations, PFAS results, lead test results, and safety grades — free.
EPA data last updated: 2026-06-23
Is Hanford Tap Water Safe to Drink?
23 of 24 tested water systems in Hanford meet federal drinking water standards with no active violations. 1 system has 1 active health-based violation — check individual reports below for details.
Hanford Water Quality Overview
Hanford, California is served by 24 community water systems providing water to approximately 70,293 residents. These systems draw from groundwater sources. 1 active health-based violation across Hanford water systems require attention. Including monitoring and reporting violations, there are 214 total violations on record.
Find Your Water System
Search by ZIP code to find your exact water provider and see its full EPA report.
All 24 water systems in Hanford
Looking for water quality data across the whole state? See our full California tap water safety report covering California’s EPA-regulated water systems.
Hanford Drinking Water: Frequently Asked Questions
Is Hanford, California tap water safe to drink?
23 of 24 tested water systems in Hanford meet federal drinking water standards with no active violations. 1 system has 1 active health-based violation — check individual reports below for details.
How many water utilities serve Hanford, California?
24 community water systems serve Hanford, California, providing water to approximately 70,293 people. Different neighborhoods may be served by different utilities. Enter your ZIP code at the top to find your specific provider.
Does Hanford 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 Hanford drinking water?
EPA violation records for Hanford 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 Hanford?
Enter your Hanford 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).