Community Water System · PWS NM3502921
Los Ojos Mdwca
Operator location Los Ojos, New Mexico - smaller served population (≤ 999) at 237 people served; 373 SDWIS violations on record from groundwater sources.
- 237
- People served (this PWS)
- 373
- EPA violations (this PWS)
- 67
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Los Ojos Mdwca standing, high SDWIS violation third
237 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 18% is middle-third health share (≤ 23%).
The verdict
Los Ojos Mdwca sits in the upper third of the sitemap cohort by violation count (373), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (237; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 18% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 373
- Total EPA violations on record
- 18%
- Health-based (MCL / treatment failure)
- 237
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 83
- County
- Rio Arriba
- School/Daycare
- No
- MCL Violations
- 13
- Monitoring Violations
- 209
- Treatment Tech Violations
- 54
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 69 | 2020 |
| Groundwater Rule | TT | 54 | 2023 |
| Public Notice | Other | 43 | 2019 |
| Consumer Confidence Rule | Other | 24 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 24 | 2018 |
| TTHM | MR | 24 | 2018 |
| Coliform (TCR) | MR | 15 | 2001 |
| Coliform (TCR) | MCL | 13 | 1998 |
| Lead and Copper Rule | MR | 10 | 2023 |
| Groundwater Rule | Other | 8 | 2022 |
| Revised Total Coliform Rule | Other | 5 | 2016 |
| Chlorine | MR | 3 | 2012 |
| Nitrate | MR | 1 | 1981 |
| CYANIDE | MR | 1 | 2005 |
| Fluoride | MR | 1 | 2005 |
| Endrin | MR | 1 | 2005 |
| Toxaphene | MR | 1 | 2005 |
| Dalapon | MR | 1 | 2005 |
| Diquat | MR | 1 | 2005 |
| Endothall | MR | 1 | 2005 |
| Glyphosate | MR | 1 | 2005 |
| Di(2-ethylhexyl) adipate | MR | 1 | 2005 |
| OXAMYL | MR | 1 | 2005 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 2005 |
| Hexachlorocyclopentadiene | MR | 1 | 2005 |
| LASSO | MR | 1 | 2005 |
| Heptachlor | MR | 1 | 2005 |
| Heptachlor epoxide | MR | 1 | 2005 |
| 2,4-D | MR | 1 | 2005 |
| 2,4,5-TP | MR | 1 | 2005 |
Violation Count vs. the National Corpus
Los Ojos Mdwca has 373 recorded EPA violations, 93% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 7% carry more. 18% of this system's own violations are health-based (67 of 373), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
373 Higher than most more violations than 93% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Population served record for Los Ojos Mdwca
EPA SDWIS lists 237 people served and 83 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
373 violations · 237 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Los Ojos Mdwca
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in New Mexico compares on the same EPA violation measures. New Mexico systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.