Community Water System · PWS NM3503521
Vallecitos Mdwca
Operator location Vallecitos, New Mexico - 45% of 553 violations are health-based (upper-third health share (> 23%)); surface water source; 84 served per SDWIS.
- 84
- People served (this PWS)
- 553
- EPA violations (this PWS)
- 251
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Vallecitos Mdwca standing, high SDWIS violation third
45% of 553 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 45% is upper-third health share (> 23%).
The verdict
Vallecitos Mdwca sits in the upper third of the sitemap cohort by violation count (553), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (84; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 45% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 553
- Total EPA violations on record
- 45%
- Health-based (MCL / treatment failure)
- 84
- 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
- 28
- County
- Rio Arriba
- School/Daycare
- No
- MCL Violations
- 39
- Monitoring Violations
- 251
- Treatment Tech Violations
- 212
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | TT | 145 | 2018 |
| Coliform (TCR) | MR | 79 | 2016 |
| Surface Water Treatment Rule | TT | 64 | 2017 |
| Surface Water Treatment Rule | MR | 42 | 2017 |
| Coliform (TCR) | MCL | 29 | 2002 |
| Consumer Confidence Rule | Other | 20 | 2015 |
| Public Notice | Other | 20 | 2019 |
| Lead and Copper Rule | MR | 15 | 2013 |
| Revised Total Coliform Rule | MON | 13 | 2018 |
| Chlorine | MR | 12 | 2017 |
| Revised Total Coliform Rule | MCL | 10 | 2017 |
| Interim Enhanced Surface Water Treatment Rule | MR | 10 | 2022 |
| Total Haloacetic Acids (HAA5) | MR | 8 | 2014 |
| TTHM | MR | 8 | 2014 |
| Long Term 2 Enhanced Surface Water Treatment Rule | TT | 3 | 2010 |
| 1,2,4-Trichlorobenzene | MR | 2 | 2006 |
| cis-1,2-Dichloroethylene | MR | 2 | 2006 |
| DICHLOROMETHANE | MR | 2 | 2006 |
| o-Dichlorobenzene | MR | 2 | 2006 |
| p-Dichlorobenzene | MR | 2 | 2006 |
| 1,2-Dichloroethane | MR | 2 | 2006 |
| 1,1,1-Trichloroethane | MR | 2 | 2006 |
| Carbon tetrachloride | MR | 2 | 2006 |
| CHLOROBENZENE | MR | 2 | 2006 |
| Toluene | MR | 2 | 2006 |
| Ethylbenzene | MR | 2 | 2006 |
| Xylenes, Total | MR | 2 | 2006 |
| Vinyl chloride | MR | 2 | 2006 |
| trans-1,2-Dichloroethylene | MR | 2 | 2006 |
| 1,2-Dichloropropane | MR | 2 | 2006 |
Violation Count vs. the National Corpus
Vallecitos Mdwca has 553 recorded EPA violations, 96% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 4% carry more. 45% of this system's own violations are health-based (251 of 553), 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)
553 Higher than most more violations than 96% 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
Health-based violations on Vallecitos Mdwca
251 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for NM3503521.
Sources: EPA SDWIS
Nationwide peers
553 violations · 84 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 Vallecitos 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.