Water Quality in La Mesa, CA: No Violations - Grade N/A
3 water systems · 2 directly mapped ZIP records
Available EPA records report no violations across 2 directly mapped ZIP records with known counts for La Mesa. This does not cover unavailable records or guarantee a specific tap is contaminant-free.
Data: EPA Safe Drinking Water Information System (SDWIS)
Water Quality by ZIP Code in La Mesa
This table shows typed EPA water evidence only. Missing violation counts are displayed as N/A, not zero.
| ZIP Code | Violations | Health | |
|---|---|---|---|
| 91941 | 0 | 0 | View report → |
| 91942 | 0 | 0 | View report → |
Water Quality Overview
La Mesa, California has directly mapped EPA water-system data for 2 ZIP codes. This page reports typed compliance facts and does not relabel the multi-source Home Safety Score as a drinking-water grade.
The available EPA records report no violations across 2 directly mapped ZIP records with reported counts for La Mesa. This does not guarantee the absence of contaminants.
Lead Levels
The average 90th percentile lead level across La Mesa water systems is 0.0000 mg/L - within EPA limits. No exceedances appear among the 2 ZIP records with known lead status.
With 83% of homes built before 1986, La Mesa has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Water Systems Serving La Mesa
La Mesa is served by 3 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 74,626 people across 4 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
How to Check Your Water in La Mesa
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels and violation history
Request your CCR - your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test - certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration - NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories - monitor your local utility website and local news for boil water advisories or system alerts
La Mesa vs. Nearby California Cities
How La Mesa's water quality compares to similar cities in California:
| City | Direct EPA ZIPs | Violations | Systems | Population |
|---|---|---|---|---|
| La Mesa | 2 | 0 | 3 | 74,626 |
| Reseda | 1 | 0 | 1 | 74,802 |
| Woodland Hills | 3 | 0 | 3 | 74,089 |
| Rancho Cordova | 2 | 4 | 5 | 75,601 |
Recommended Water Filters for La Mesa
Based on contaminants detected in La Mesa's water supply, these filter types are recommended:
Reverse Osmosis (under-sink)
- Removes: Uranium
- Effectiveness: 90-99%
- Cost range: $150–$500
- Certification: NSF/ANSI 58
- Recommended products:
- Waterdrop G3P800
- iSpring RCC7AK
Granular Activated Carbon (GAC, whole-house or under-sink)
- Removes: Chloramines as Cl2
- Effectiveness: 95-99%
- Cost range: $100–$600
- Certification: NSF/ANSI 42
- Recommended products:
- Aquasana AQ-5200
- Waterdrop Chubby Pitcher
- Berkey Travel
Common Questions About La Mesa Water
These are the most common questions residents search for about water quality in La Mesa, California:
Is La Mesa water hard or soft? Water hardness varies by source. La Mesa's 3 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink La Mesa tap water? City-level EPA records cannot determine safety at a specific tap. No health-based violations are recorded across 2 directly mapped ZIP records with known counts, but this is not a property-level safety guarantee.
What is the best water filter for La Mesa? Based on detected contaminants, a reverse osmosis (under-sink) filter is most recommended. See our Water Filter Matcher for personalized recommendations.
La Mesa vs. California Average
Understanding how La Mesa compares to the broader California average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below - water quality can vary significantly even within La Mesa.
ZIP Codes in La Mesa
La Mesa spans 4 ZIP codes. EPA water-system coverage is available for 2 directly mapped ZIP codes. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Source reporting periods vary. See each cited source for its publication schedule.