Haloacetic Acids
Approaching LimitDetected level
44.5997 ug/L
0%EPA Limit (60 ug/L)
74% of EPA limit
Health effects: Disinfection byproducts associated with increased cancer risk and potential reproductive effects.
Loading water data...
Tap Water Safety Report for San Buenaventura, California
San Buenaventura, California tap water scored 49/100 (F) based on EPA data. Multiple contaminants are at concerning levels. A water filter is recommended, especially for children and pregnant women.
Overall Score
49/100
Grade: F
Contaminants Tested
9
All within limits
EPA Violations
5
All resolved
Water Source
mixed
Mixed sources
Population Served
109,996
residents
Water Systems
1
serving this area
1 contaminant(s) are approaching EPA limits and should be monitored.
Detected level
44.5997 ug/L
74% of EPA limit
Health effects: Disinfection byproducts associated with increased cancer risk and potential reproductive effects.
Based on San Buenaventura's water quality data, here are our specific recommendations:
San Buenaventura's water has multiple contaminants at concerning levels. An under-sink reverse osmosis system or a certified multi-stage filter is strongly recommended for drinking and cooking water.
Babies and young children are especially vulnerable to water contaminants. Use filtered or bottled water for mixing formula and for drinking water until filtration is installed.
How contaminant levels compare to EPA limits (50% of overall score)
EPA violation history and enforcement actions (30% of overall score)
Water system infrastructure and source quality (20% of overall score)
With a score of 49/100, San Buenaventura's tap water has significant quality concerns. We strongly recommend against using unfiltered tap water for babies or young children. Use bottled water or invest in a reverse osmosis filter for any water consumed by children. Infants are especially vulnerable to contaminants like lead and nitrates, which can cause serious developmental and health issues.
San Buenaventura's water has been tested for 9 contaminants. None currently exceed EPA maximum contaminant levels. The most notable detections include: Haloacetic Acids (44.5997 ug/L, EPA limit: 60 ug/L — 74% of limit); Lead (0.0075 mg/L, EPA limit: 0.015 mg/L — 50% of limit); Chromium (0.0442 mg/L, EPA limit: 0.1 mg/L — 44% of limit); Mercury (0.0009 mg/L, EPA limit: 0.002 mg/L — 43% of limit); Arsenic (0.004 mg/L, EPA limit: 0.01 mg/L — 40% of limit). The water system has no active EPA violations. Water quality can vary seasonally and by neighborhood, so home testing provides the most accurate picture for your specific tap.
Absolutely. With a water quality score of 49/100, filtering is strongly recommended in San Buenaventura. A reverse osmosis (RO) system is the most effective option, removing up to 99% of contaminants. At minimum, use a certified pitcher filter rated for the specific contaminants found in your water. Multiple contaminants at concerning levels make filtration an important health measure.
San Buenaventura's water quality score of 49/100 (F) is 23 points below the national average of 72. The city's water comes from a mix of groundwater and surface water sources. This indicates significant water quality challenges that the city should work to address. You can see how San Buenaventura compares to nearby cities in our state rankings.
Detailed contaminant data, violation history, and water system information for San Buenaventura.
Find the best water filter for San Buenaventura based on detected contaminants and your budget.
See how San Buenaventura compares to other cities across California.
See how San Buenaventura ranks among all cities in the US for water quality.
Data Disclaimer
This report is based on publicly available EPA data and water quality test results. Water quality can vary by neighborhood, building age, and season. This information is for educational purposes and should not replace professional water testing. If you have specific health concerns about your water, contact your local water utility or a certified water testing laboratory. Last data update: February 2, 2026.