Water Quality in Sherman Oaks, CA: No Violations — Grade D
Grade D · Score 50/100 · 2 water systems · Updated 2026-05-03
Sherman Oaks's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Within the water supply network of Sherman Oaks, CA, no EPA violations appear anywhere in the federal compliance record — 2 public water systems are tracked here, and not one has been cited for an MCL exceedance, a monitoring failure, or any other reportable compliance event.
Water Quality by ZIP Code in Sherman Oaks
Water quality varies across Sherman Oaks's 4 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 91403 | D | 45 | 0 | 0 | View report → |
| 91423 | D | 50 | 0 | 0 | View report → |
| 91413 | D | 53 | 0 | 0 | View report → |
| 91495 | D | 53 | 0 | 0 | View report → |
Water Quality Overview
Sherman Oaks, California receives a water quality grade of D with an overall score of 50 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
No EPA violations have been recorded for the 2 water systems serving Sherman Oaks. This is a positive indicator, though it does not guarantee the absence of all contaminants — some substances (like PFAS) are not yet fully regulated.
What Grade D Means
A grade of D indicates significant compliance issues. Sherman Oaks's water systems have accumulated violations that suggest ongoing water quality challenges. Residents should check their specific ZIP code report and consider water testing or filtration.
Lead Levels
Lead testing data for Sherman Oaks is currently being collected. The EPA requires all community water systems to test for lead under the Lead and Copper Rule.
With 79% of homes built before 1986, Sherman Oaks 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.
Radon Risk
Sherman Oaks is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving Sherman Oaks
Sherman Oaks is served by 2 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 3,875,648 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 Sherman Oaks
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
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
Sherman Oaks vs. Nearby California Cities
How Sherman Oaks's water quality compares to similar cities in California:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Sherman Oaks | D | 0 | 2 | 3,875,648 |
| Culver City | C | 0 | 1 | 3,875,566 |
| Dodgertown | D | 0 | 1 | 3,875,566 |
| Harbor City | C | 0 | 1 | 3,875,566 |
Water Quality by ZIP Code in Sherman Oaks
Water quality varies across Sherman Oaks's ZIP codes. The table below shows the worst-scoring and best-scoring areas:
| ZIP Code | Score | Grade | Violations | Health-Based |
|---|---|---|---|---|
| 91403 | 45 | D | 0 | 0 |
| 91423 | 50 | D | 0 | 0 |
| 91413 | 53 | D | 0 | 0 |
| 91495 | 53 | D | 0 | 0 |
Common Questions About Sherman Oaks Water
These are the most common questions residents search for about water quality in Sherman Oaks, California:
Is Sherman Oaks water hard or soft? Water hardness varies by source. Sherman Oaks's 2 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Sherman Oaks tap water? Sherman Oaks's water receives a grade of D (50/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Sherman Oaks? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Sherman Oaks vs. California Average
Understanding how Sherman Oaks 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 Sherman Oaks.
ZIP Codes in Sherman Oaks
Sherman Oaks spans 4 ZIP codes. Each ZIP code has its own water quality profile based on the specific water system serving that area. 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
Updated daily.