Rancho Santa Teresa Mw Company
EPA ID: CA3700918 · 102 people served · 1 ZIP code
Five clean years on EPA record — Rancho Santa Teresa Mw Company, 102 residents served.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 2 (2023) to 2 (2024). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Rancho Santa Teresa Mw Company Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Rancho Santa Teresa Mw Company serves a community with a median household income of $120,550 and an estimated 37,397 residents across its service area. Approximately 53% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Rancho Santa Teresa Mw Company'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
Comparable Water Systems
Similar-sized systems in California
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
Rancho Santa Teresa Mw Company (EPA ID: CA3700918) is a community water system in California that serves approximately 102 people from groundwater sources.
This system serves ZIP code 92065 in Ramona.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by CA or modeled from parcel and building-footprint data.
- 92065 — Ramona
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Rancho Santa Teresa Mw Company (CA3700918) on EPA.gov.
Frequently Asked Questions
Is Rancho Santa Teresa Mw Company water safe to drink?
Based on EPA records, Rancho Santa Teresa Mw Company has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Rancho Santa Teresa Mw Company serve?
Rancho Santa Teresa Mw Company serves approximately 102 people across 1 ZIP code in California.
Where does Rancho Santa Teresa Mw Company 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.