Water Quality in Porter Ranch, CA: No Violations — Grade C
Grade C · Score 55/100 · 1 water system · Updated 2026-05-03
Porter Ranch's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Within the water supply network of Porter Ranch, CA, no EPA violations appear anywhere in the federal compliance record — 1 public water system 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 Porter Ranch
Water quality varies across Porter Ranch's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 91326 | C | 55 | 0 | 0 | View report → |
Water Quality Overview
Porter Ranch, California receives a water quality grade of C with an overall score of 55 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
No EPA violations have been recorded for the 1 water system serving Porter Ranch. 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 C Means
A grade of C indicates moderate compliance issues. Porter Ranch's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
Lead testing data for Porter Ranch is currently being collected. The EPA requires all community water systems to test for lead under the Lead and Copper Rule.
With 59% of homes built before 1986, Porter Ranch 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
Porter Ranch is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving Porter Ranch
Porter Ranch is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 94,738 people across 1 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 Porter Ranch
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
Porter Ranch vs. Nearby California Cities
How Porter Ranch's water quality compares to similar cities in California:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Porter Ranch | C | 0 | 1 | 94,738 |
| Brandeis | D | 0 | 1 | 94,738 |
| Chatsworth | D | 0 | 1 | 94,738 |
| Capitola | C | 0 | 1 | 94,626 |
Common Questions About Porter Ranch Water
These are the most common questions residents search for about water quality in Porter Ranch, California:
Is Porter Ranch water hard or soft? Water hardness varies by source. Porter Ranch's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Porter Ranch tap water? Porter Ranch's water receives a grade of C (55/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Porter Ranch? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Porter Ranch vs. California Average
Understanding how Porter Ranch 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 Porter Ranch.
ZIP Codes in Porter Ranch
Porter Ranch spans 1 ZIP code. 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.