Water Quality in North San Juan, CA: No Violations — Grade D
Grade D · Score 52/100 · 1 water system · Updated 2026-05-03
North San Juan's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Not one violation appears in CA's EPA file for North San Juan — 1 monitored system, all clear.
Water Quality by ZIP Code in North San Juan
Water quality varies across North San Juan's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 95960 | D | 52 | 0 | 0 | View report → |
Water Quality Overview
North San Juan, California receives a water quality grade of D with an overall score of 52 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 North San Juan. 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. North San Juan'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
The average 90th percentile lead level across North San Juan water systems is 0.0144 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 69% of homes built before 1986, North San Juan 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
North San Juan is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving North San Juan
North San Juan is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 90 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
The EPA has taken 1 enforcement action against water systems serving North San Juan. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in North San Juan
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
EPA Enforcement History
The EPA and state regulators have taken 1 enforcement action against water systems serving North San Juan. Recent actions:
| Date | Action Type |
|---|---|
| 2021-07-16 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2021-07-16.
North San Juan vs. Nearby California Cities
How North San Juan's water quality compares to similar cities in California:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| North San Juan | D | 0 | 1 | 90 |
| Calpella | C | 0 | 1 | 90 |
| Clarksburg | B | 0 | 1 | 90 |
| Clipper Mills | A | 2 | 1 | 90 |
Common Questions About North San Juan Water
These are the most common questions residents search for about water quality in North San Juan, California:
Is North San Juan water hard or soft? Water hardness varies by source. North San Juan's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink North San Juan tap water? North San Juan's water receives a grade of D (52/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for North San Juan? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
North San Juan vs. California Average
Understanding how North San Juan 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 North San Juan.
ZIP Codes in North San Juan
North San Juan 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.