Rancho Santa Teresa Mw Company
EPA ID: CA3700918 · 102 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Rancho Santa Teresa Mw Company (CA3700918): 3 past health-based violations, since resolved. Dating back across the full five-year EPA tracking window, Rancho Santa Teresa Mw Company encountered 19 violations, each subsequently remedied and closed - today the utility meets all federal drinking water requirements for the 102 residents in its service area and holds no open enforcement actions.
Data: EPA SDWIS
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.
Infrastructure Risk
Detected Contaminants
How Rancho Santa Teresa Mw Company compares to EPA limits
What This Means For You
Lead at 7 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.
Consumer Confidence Report Rule at 10 mg/L exceeds the EPA maximum of mg/L.
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper 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
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
Status breakdown for accepted records with record years 2021-2026: 14 resolved, 5 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| October 1, 2024 | Lead | Health-based | Archived |
| October 1, 2023 | Lead | Health-based | Archived |
| August 29, 2023 | Lead and Copper Rule | Non-health-based | Resolved |
| July 1, 2023 | Lead | Health-based | Archived |
| July 1, 2022 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| June 1, 2022 | Consumer Confidence Report Rule | Non-health-based | Archived |
| May 1, 2022 | Consumer Confidence Report Rule | Non-health-based | Archived |
| April 1, 2022 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| April 1, 2022 | Lead | Non-health-based | Resolved |
| February 1, 2022 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| January 1, 2022 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| October 1, 2021 | Stage 1 DBP Rule | Non-health-based | Resolved |
| October 1, 2021 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| July 1, 2021 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| July 1, 2021 | Lead | Non-health-based | Resolved |
| April 1, 2021 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| April 1, 2021 | Lead | Non-health-based | Resolved |
| January 1, 2021 | Lead | Non-health-based | Resolved |
| January 1, 2021 | Consumer Confidence Report Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting Failure | 10 | No |
| Lead | Inorganic | 7 | Yes |
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
| Lead and Copper Rule | Treatment Failure | 1 | No |
Health Risk Details
Lead (EPA limit: 0.015 mg/L (action level))
Brain damage in children, kidney & blood pressure in adults At-risk groups: infants, children under 6, pregnant women.
Removal methods: reverse osmosis, distillation, certified carbon block filter (NSF/ANSI 53). Find the right filter →
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0037 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Rancho Santa Teresa Mw Company; its 19 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
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.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Rancho Santa Teresa Mw Company (CA): 3 Health Violations. https://zipcheckup.com/water-system/ca3700918/
@misc{zipcheckup-water-system-ca3700918,
author = {{ZipCheckup}},
title = {{Rancho Santa Teresa Mw Company (CA): 3 Health Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ca3700918/}
}
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
Rancho Santa Teresa Mw Company (EPA ID: CA3700918) - request the latest Consumer Confidence Report or ask about specific contaminants.