Water Quality in San Bernardino, CA: 24 Violations - Grade N/A
12 water systems · 8 directly mapped ZIP records
Available EPA records report 24 violations across 8 directly mapped ZIP records with known counts for San Bernardino. This is compliance evidence, not a property-level tap-water verdict.
Data: EPA Safe Drinking Water Information System (SDWIS)
Water Quality by ZIP Code in San Bernardino
This table shows typed EPA water evidence only. Missing violation counts are displayed as N/A, not zero.
| ZIP Code | Violations | Health | |
|---|---|---|---|
| 92407 | 20 | 1 | View report → |
| 92411 | 16 | 0 | View report → |
| 92404 | 2 | 0 | View report → |
| 92408 | 2 | 0 | View report → |
| 92410 | 1 | 0 | View report → |
| 92401 | 0 | 0 | View report → |
| 92405 | 0 | 0 | View report → |
| 92415 | 0 | 0 | View report → |
Water Quality Overview
San Bernardino, California has directly mapped EPA water-system data for 8 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 24 violations, including 1 health-based violation across 8 directly mapped ZIP records with reported counts.
Lead Levels
The average 90th percentile lead level across San Bernardino water systems is 0.0225 mg/L - this exceeds the EPA action level of 0.015 mg/L. 1 ZIP code exceed the EPA lead action level.
With 73% of homes built before 1986, San Bernardino 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 San Bernardino
San Bernardino is served by 12 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 255,071 people across 18 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
The EPA has taken 21 enforcement actions against water systems serving San Bernardino. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in San Bernardino
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
Contaminants Detected in San Bernardino Water Systems
The following contaminants have been detected or caused violations across San Bernardino's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Lead | Inorganic | 0.015 mg/L | 3 | 3 | No |
| Stage 2 DBP Rule | Treatment Technique | N/A | 2 | 1 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 1 | 1 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 1 | 1 | No |
| Chlorodibromoacetic Acid | Disinfection Byproducts | 0.06 mg/L | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 13 enforcement actions against water systems serving San Bernardino. Recent actions:
| Date | Action Type |
|---|---|
| 2025-06-11 | State Order Extension |
| 2024-08-15 | State Order Extension |
| 2024-05-31 | State Order Extension |
| 2024-05-22 | State Filed Suit |
| 2024-02-06 | State Order Extension |
| 2024-01-17 | State Filed Suit |
| 2024-01-11 | State Order Extension |
| 2023-07-07 | State Order Extension |
| 2023-03-16 | State Order Extension |
| 2023-02-16 | State Filed Suit |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-06-11.
San Bernardino vs. Nearby California Cities
How San Bernardino's water quality compares to similar cities in California:
| City | Direct EPA ZIPs | Violations | Systems | Population |
|---|---|---|---|---|
| San Bernardino | 8 | 24 | 12 | 255,071 |
| Corona | 5 | 51 | 11 | 262,651 |
| Modesto | 7 | 5 | 10 | 268,575 |
| Chula Vista | 5 | 1 | 3 | 272,064 |
Recommended Water Filters for San Bernardino
Based on contaminants detected in San Bernardino's water supply, these filter types are recommended:
Reverse Osmosis (under-sink)
- Removes: Arsenic, Gross Alpha Particle Activity, Lead, Nitrate as Nitrogen
- Effectiveness: 90-99%
- Cost range: $150–$500
- Certification: NSF/ANSI 58
- Recommended products:
- Waterdrop G3P800
- iSpring RCC7AK
- Crystal Quest Arsenic Filter
Water Quality by ZIP Code in San Bernardino
EPA coverage and recorded violations can differ across San Bernardino's ZIP codes. Missing counts are shown as unavailable, not zero:
| ZIP Code | Violations | Health-Based |
|---|---|---|
| 92407 | 20 | 1 |
| 92411 | 16 | 0 |
| 92404 | 2 | 0 |
| 92408 | 2 | 0 |
| 92410 | 1 | 0 |
| 92401 | 0 | 0 |
| 92405 | 0 | 0 |
| 92415 | 0 | 0 |
Common Questions About San Bernardino Water
These are the most common questions residents search for about water quality in San Bernardino, California:
Is San Bernardino water hard or soft? Water hardness varies by source. San Bernardino's 12 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink San Bernardino tap water? City-level EPA records cannot determine safety at a specific tap. The measured subset contains 1 health-based violation; check the affected utility record and consider certified testing.
What is the best water filter for San Bernardino? Based on detected contaminants, a reverse osmosis (under-sink) filter is most recommended. See our Water Filter Matcher for personalized recommendations.
San Bernardino vs. California Average
Understanding how San Bernardino 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 San Bernardino.
ZIP Codes in San Bernardino
San Bernardino spans 18 ZIP codes. EPA water-system coverage is available for 8 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.