Cal-am Drinking Water Quality
What's Really in Your Tap Water?
Cal-am tap water meets EPA standards, though there are a few things worth knowing. With 162 ppm hardness (9.5 gpg), expect some mineral deposits over time. Lead levels test well below the EPA action level. Only 2 minor violations in the past 3 years.
Generally Safe
Minor compliance issues
9.5 GPG hardness
Lead
Below EPA action level
EPA action level: 15 ppb
Hardness
Hard water
US Average: 100 ppm
Is Cal-am Tap Water Safe to Drink?
Cal-am tap water is generally safe with minor compliance issues.
EPA Violations — 2 health-based violations recorded in the past 3 years across 3 water systems.
Health-based violations indicate a contaminant exceeded EPA maximum contaminant levels. The water utility is required to take corrective action.
→ Consider testing your water at home for peace of mind.
Lead — Lead (1.75 ppb) is at 12% of the EPA action level of 15 ppb.
The data below shows test results from 3 water utilities serving 141K people in the Cal-am area.
Based on publicly available data from EPA Water Quality Portal (Various). Water quality can vary by location, building plumbing, and over time. This assessment reflects compliance with federal EPA standards and is not medical advice.
Do I Need a Water Filter?
With hard water (162 ppm), a water softener can reduce scale buildup in pipes, appliances, and water heaters.
How Hard is Cal-am Water?
162 ppm
9.5 grains per gallon
Hard water can cause scale buildup in pipes and appliances. A water softener may be beneficial.
Impact on Your Home
Shower
May dry out skin & hair
Kitchen
Spots on dishes
Laundry
Clothes may feel stiff
Appliances
Scale buildup
Regional Comparison
Values in ppm (mg/L as CaCO₃)
Do I Need a Water Softener?
At 162 ppm, Cal-am has hard water. You may notice white spots on dishes, dry skin after showering, and mineral buildup on fixtures. A water softener can help reduce these effects. Hard water is generally not a health concern according to the WHO.
Based on 122 water samples from Los Angeles County
Your pipes tell a different story
The data above shows what leaves the treatment plant—not what comes out of your faucet. Old pipes, lead solder, and building plumbing can add contaminants the city never tests for. Know exactly what's in your Cal-am tap water.
Home test kits detect lead, bacteria, pesticides, and 100+ other contaminants. Results in 5-10 business days from certified labs.
Lead & Contaminants
Understanding lead levels and water quality violations in Cal-am
Lead Test Results
90th Percentile Lead Level
1.75 ppb
Cal-am lead levels are well below the EPA action level.
Regular testing is still recommended, as lead can enter water through household plumbing.
Last sampled: 2026-12-31
About Lead in Drinking Water
What is Lead in Water?
According to the EPA, lead is a toxic metal that can dissolve into drinking water from older pipes, solder, and fixtures. It's invisible, tasteless, and odorless, making testing the only way to detect it. The EPA has set an action level of 15 ppb and states there is no safe level of lead exposure.
Potential Health Effects
According to the CDC: developmental delays, learning difficulties, lower IQ, behavioral issues
According to the EPA: high blood pressure, kidney damage, reproductive issues
How to Reduce Exposure
- •Run water for 30 seconds to 2 minutes before drinking, especially in the morning
- •Use cold water for cooking and drinking (hot water dissolves more lead)
- •Install a NSF-certified filter designed to remove lead
- •Test your water, especially if your home was built before 1986
EPA Compliance History
Action Recommended
Active health-based violations detectedConsider using a certified water filter until violations are resolved. Contact your utility for updates on corrective actions.
3-Year Violation Summary
2
Total Violations
2
Health-Related
0
Administrative
Health-Related Violations
Contaminant exceeded EPA maximum contaminant levels. The EPA recommends considering certified filtration.
Administrative Violations
Missed testing deadlines or reporting. Does not indicate water quality issues.
Who Provides Cal-am's Water?
Utility Name
CAL-AM WATER CORONADO
EPA System ID (PWSID)
CA3710001
Primary Water Source
Groundwater
Population Served
141K
Frequently Asked Questions
Common questions about Cal-am tap water quality
Nearby Cities in California
Los Angeles
Hard water
East Bay
Very Hard water
San Diego
Very Hard water
San Jose
Very Hard water
California
Hard water
Eastern Municipal Wd
Very Hard water
This data is for informational purposes only. Water quality can vary by neighborhood and building. For official reports, contact your local water utility or the EPA. Learn about our methodology
Data source: EPA Water Quality Portal (environmental samples, not verified tap water)