A85/100
Castroville Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 7,515 residents · California
What's In Castroville's Tap Water?
31
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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
CASTROVILLE COMMUNITY SERVICES DISTRICT
Population Served
7,515
Water Source
Groundwater
System ID
CA2710005
Frequently Asked Questions About Castroville Water
Is Castroville tap water safe to drink?
Castroville, California tap water receives a grade of A (85/100), which is considered excellent. Out of 31 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 Castroville's water?
31 contaminants were tested in Castroville's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Castroville have any water quality violations?
Yes, Castroville has 7 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MCL, Other. 2 of these are health-based violations, which are the most serious category.
Do I need a water filter in Castroville?
Castroville 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 Castroville's tap water come from?
Castroville's drinking water is sourced from groundwater and supplied by CASTROVILLE COMMUNITY SERVICES DISTRICT. The system serves approximately 7,515 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Castroville'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. Castroville'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 Castroville's water compare to other cities in California?
Castroville's water quality score of 85/100 earns a grade of A, which is considered excellent. This places Castroville 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 Castroville's water quality?
If you have concerns about Castroville'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 (CASTROVILLE COMMUNITY SERVICES DISTRICT) 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.