A94/100
California Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 52,209 residents · Maryland
What's In California's Tap Water?
66
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
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: June 1, 2023 – August 31, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
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
BRETON BAY
Population Served
1,012
Water Source
Groundwater
System ID
MD0180001
CEDAR COVE
Population Served
2,728
Water Source
Groundwater
System ID
MD0180002
LEXINGTON PARK
Population Served
43,030
Water Source
Groundwater
System ID
MD0180007
WICOMICO SHORES
Population Served
1,262
Water Source
Groundwater
System ID
MD0180018
COUNTRY LAKES
Population Served
3,016
Water Source
Groundwater
System ID
MD0180023
GREENBRIER
Population Served
1,161
Water Source
Groundwater
System ID
MD0180045
Frequently Asked Questions About California Water
Is California tap water safe to drink?
California, Maryland tap water receives a grade of A (94/100), which is considered excellent. Out of 66 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 California's water?
66 contaminants were tested in California's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does California have any water quality violations?
Yes, California has 27 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MCL. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in California?
California 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 California's tap water come from?
California's drinking water is sourced from groundwater and supplied by BRETON BAY and 5 other water system(s). The system serves approximately 52,209 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is California'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. California'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 California's water compare to other cities in Maryland?
California's water quality score of 94/100 earns a grade of A, which is considered excellent. This places California among the better-performing water systems in Maryland. Visit our Maryland state page to see how all cities in the state compare.
What should I do if I'm concerned about California's water quality?
If you have concerns about California'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 (BRETON BAY) 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.