Los Ojos Mdwca
EPA ID: NM3502921 · 237 people served · 1 ZIP code
Compliance tracking for Los Ojos Mdwca shows 16 pending violations logged in the EPA system — the supplier delivers water to approximately 237 residents while those findings remain open.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 1 (2022) to 2 (2024). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Los Ojos Mdwca Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
💧 Where Does Your Water Come From?
Los Ojos Mdwca'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 3% of homes in Rio Arriba County, New Mexico rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Detected Contaminants
How Los Ojos Mdwca compares to EPA limits
What This Means For You
Surface Water Treatment Rule at 8 mg/L exceeds the EPA maximum of mg/L.
E. coli at 6 Zero tolerance (any positive sample triggers immediate action) exceeds the EPA maximum of Zero tolerance (any positive sample triggers immediate action). Severe GI illness; potentially fatal kidney failure in children. Consider UV disinfection (99.99%) filtration.
Contaminant 0700 at 5 mg/L exceeds the EPA maximum of mg/L.
Fecal Coliform at 5 presence exceeds the EPA maximum of presence.
Stage 2 DBP Rule at 4 mg/L exceeds the EPA maximum of mg/L.
E. coli was detected in this water system. UV disinfection (99.99%) 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
Los Ojos Mdwca (EPA ID: NM3502921) is a community water system in New Mexico that serves approximately 237 people from groundwater sources.
This system serves ZIP code 87551 in Los Ojos.
Average Home Safety Score: C (62/100)
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 |
|---|---|---|---|
| August 1, 2025 | E. coli | Monitoring | Unresolved |
| August 1, 2025 | Fecal Coliform | Monitoring | Unresolved |
| July 1, 2025 | Surface Water Treatment Rule | Monitoring | Unresolved |
| July 1, 2025 | Stage 1 DBP Rule | Monitoring | Unresolved |
| May 1, 2025 | Fecal Coliform | Monitoring | Resolved |
| May 1, 2025 | E. coli | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Unresolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Unresolved |
| October 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| October 1, 2024 | Stage 1 DBP Rule | Monitoring | Unresolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Unresolved |
| May 1, 2024 | E. coli | Monitoring | Unresolved |
| February 24, 2024 | Lead and Copper Rule | Monitoring | Unresolved |
| January 1, 2024 | E. coli | Monitoring | Resolved |
| January 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| December 1, 2023 | E. coli | Monitoring | Resolved |
| December 1, 2023 | Fecal Coliform | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Surface Water Treatment Rule | Treatment Failure | 8 | No |
| E. coli | Microbiological | 6 | No |
| Contaminant 0700 | Other Violation | 5 | Yes |
| Fecal Coliform | Microbiological | 5 | Yes |
| Stage 2 DBP Rule | Treatment Failure | 4 | Yes |
| Stage 1 DBP Rule | Treatment Failure | 3 | No |
| Lead and Copper Rule | Treatment Failure | 3 | No |
| Consumer Confidence Report Rule | Reporting Failure | 2 | 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 |
|---|---|---|---|
| 87551 | 0.0012 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
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
- 87551 — Los Ojos
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Los Ojos Mdwca (NM3502921) on EPA.gov.
Frequently Asked Questions
Is Los Ojos Mdwca water safe to drink?
Los Ojos Mdwca has recorded 5 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 Los Ojos Mdwca serve?
Los Ojos Mdwca serves approximately 237 people across 1 ZIP code in New Mexico.
Where does Los Ojos Mdwca get its water?
The primary water source is groundwater.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: LOS OJOS MDWCA Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
Notable events and violations
This section summarizes events the utility chose to disclose in its most recent Consumer Confidence Report, plus any federal compliance violations the utility recorded against itself. Both lists are utility-authored — ZipCheckup does not audit, judge, or reorder them.
Federal compliance violations on record
These entries are taken verbatim from the utility's CCR violations section. EPA defines four broad violation categories: Maximum Contaminant Level (MCL), Treatment Technique (TT), Monitoring & Reporting (M&R), and Public Notification (PN).
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reporting2024-10-01/2024-12-18
Consumer Confidence Rule adequacy/availability/content violation.
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treatment technique2023-03-02/2024-01-17
Ground Water Rule failure to address deficiency.
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treatment technique2023-03-02/2024-12-26
Ground Water Rule failure to address deficiency.
-
monitoring2023-10-01/2024-09-29
Lead and Copper Rule follow-up or routine tap monitoring/reporting violation.
Violations record from LOS OJOS MDWCA Consumer Confidence Report.
ZipCheckup note: items above reflect what the utility published in its most recent CCR. Federal violation records are also tracked separately by the EPA Safe Drinking Water Information System (SDWIS) — the SDWIS record is the authoritative federal source for any specific regulatory action.
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
Los Ojos Mdwca (EPA ID: NM3502921) — request the latest Consumer Confidence Report or ask about specific contaminants.