Guatay Mutual Benefit Corporation
EPA ID: CA3700897 · 100 people served · 2 ZIP codes
EPA compliance records for Guatay Mutual Benefit Corporation show 14 unresolved violations — findings that remain open and are tracked at the federal level, covering a service territory of approximately 100 people.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 89% chance of violation in next 12 months
Violations went from 4 (2021) to 6 (2023). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Guatay Mutual Benefit Corporation Source: EPA SDWIS service area boundaries.
Service area boundary — Grade D
Service Area Demographics
The Guatay Mutual Benefit Corporation serves a community with a median household income of $80,321 and an estimated 2,492 residents across its service area. Approximately 57% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Guatay Mutual Benefit Corporation's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 1% of homes in San Diego County, California rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Guatay Mutual Benefit Corporation compares to EPA limits
What This Means For You
Lead at 1 mg/L (action level) exceeds the EPA maximum of 0.015 mg/L (action level). Brain damage in children, kidney & blood pressure in adults. Consider reverse osmosis filtration.
Combined Radium at 12 pCi/L exceeds the EPA maximum of 5 pCi/L.
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Lead was detected in this water system. reverse osmosis filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
GUATAY MUTUAL BENEFIT CORPORATION (EPA ID: CA3700897) is a community water system in California that serves approximately 100 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Average Home Safety Score: D (50/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| October 1, 2023 | Combined Radium | Health-based | Unresolved |
| July 1, 2023 | Combined Radium | Health-based | Unresolved |
| January 1, 2023 | Combined Radium | Health-based | Unresolved |
| January 1, 2023 | Lead | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Combined Radium | Radionuclides | 12 | Yes |
| Lead | Inorganic | 1 | No |
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 91931 | 0.035 mg/L | Yes | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Guatay Mutual Benefit Corporation (CA3700897) on EPA.gov.
Frequently Asked Questions
Is Guatay Mutual Benefit Corporation water safe to drink?
Guatay Mutual Benefit Corporation has recorded 12 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Guatay Mutual Benefit Corporation serve?
Guatay Mutual Benefit Corporation serves approximately 100 people across 2 ZIP codes in California.
Where does Guatay Mutual Benefit Corporation get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Guatay Mutual Benefit Corporation (EPA ID: CA3700897) — request the latest Consumer Confidence Report or ask about specific contaminants.