D
48

Poor Water Quality

Santa Ysabel, CA 92070

San Diego County · Population served: 10,554 · Data updated March 2026

Water Systems Serving This Area

🌊
San Felipe Water System
Groundwater · Pop. 52
PWSID: 090600115
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Santa Ysabel Main
Groundwater · Pop. 325
PWSID: 090600150
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Mesa Grande (Tract 2)
Groundwater · Pop. 43
PWSID: 090605011
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Mesa Grande - Black Canyon
Groundwater · Pop. 81
PWSID: 090605132
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LAKE HENSHAW RESORT INC.
Groundwater · Pop. 9,913
PWSID: CA3700900

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
10.0
15 ppb 1 ppb Warning

Violation History (Last 5 Years)

35Total (5yr)
13Health-Based
16Major

Water Quality Summary

Understanding Your Water in Santa Ysabel

Tap water quality in Santa Ysabel, California (92070) receives an overall grade of D (Poor) with a score of 48 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 33 points below the California state average of 81. Compared to the national average (75), this area scores significantly lower. The area is served by 6 water systems providing water to approximately 10,554 people, using groundwater sources. Testing has found elevated levels of Lead that warrant attention. Over the past 5 years, water systems here have accumulated 35 violations, including 13 health-based violations.

Your Score 48/100 D
vs State 33 pts below California avg (81)
vs National 27 pts below national avg (75)

What a Grade D Means

A score of 48/100 signals poor water quality in Santa Ysabel, CA. Significant issues have been identified, which may include multiple violations, contaminant levels near or above regulatory limits, or PFAS contamination. We recommend reviewing the detailed contaminant data below, considering a certified water filter, and checking your utility's Consumer Confidence Report for the latest information.

Groundwater: drawn from underground aquifers via wells

Health Information

What These Contaminants Mean for You

⚠️

Lead in Your Water

Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.

Health Effects

Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.

Common Sources

Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.

What You Can Do

If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.

Common Questions

Frequently Asked Questions

Tap water in Santa Ysabel, California receives a grade of D (Poor) with a score of 48/100. This indicates significant water quality concerns based on violation history, contaminant levels, or enforcement actions. We recommend reviewing the specific contaminants detected below and considering a certified water filter.

ZIP code 92070 is served by 6 water systems using groundwater sources, providing water to approximately 10,554 people. Groundwater is naturally filtered through rock and soil, often requiring less treatment. However, it can be vulnerable to contamination from underground sources like naturally occurring arsenic, nitrates from agriculture, or PFAS from industrial sites.

Lead was detected at 10.0 ppb in Santa Ysabel, California. While this is below the EPA action level of 15 ppb, it exceeds the health guideline of 1 ppb recommended by health organizations. Consider a certified lead filter, especially if you have young children.

No PFAS ("forever chemicals") were detected in water systems serving Santa Ysabel, California during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Santa Ysabel, California have received 35 violations in the last 5 years, including 13 health-based violations. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Based on detected contaminants (lead), residents in Santa Ysabel, California should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

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