Community Water System · PWS NM3573725
Big Mesa Water Mdwca
Operator location Conchas Dam, New Mexico - 25% of 332 violations are health-based (upper-third health share (> 23%)); surface water source; 250 served per SDWIS.
- 250
- People served (this PWS)
- 332
- EPA violations (this PWS)
- 82
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Big Mesa Water Mdwca standing, high SDWIS violation third
25% of 332 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 25% is upper-third health share (> 23%).
The verdict
Big Mesa Water Mdwca sits in the upper third of the sitemap cohort by violation count (332), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (250; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 25% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 332
- Total EPA violations on record
- 25%
- Health-based (MCL / treatment failure)
- 250
- 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
- 572
- County
- San Miguel
- School/Daycare
- No
- MCL Violations
- 78
- Monitoring Violations
- 230
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 87 | 2017 |
| Interim Enhanced Surface Water Treatment Rule | MR | 68 | 2017 |
| TTHM | MCL | 64 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 16 | 2022 |
| TTHM | MR | 16 | 2022 |
| Coliform (TCR) | MCL | 14 | 2012 |
| Lead and Copper Rule | MR | 14 | 2023 |
| Chlorine | MR | 12 | 2010 |
| Public Notice | Other | 11 | 2018 |
| Asbestos | MR | 4 | 2020 |
| Interim Enhanced Surface Water Treatment Rule | TT | 4 | 2016 |
| Coliform (TCR) | MR | 2 | 1991 |
| E. COLI | MR | 2 | 2008 |
| Fluoride | MR | 2 | 1982 |
| Nitrate | MR | 1 | 1980 |
| Arsenic | MR | 1 | 1982 |
| Chromium | MR | 1 | 1982 |
| Selenium | MR | 1 | 1982 |
| Cadmium | MR | 1 | 1982 |
| Mercury | MR | 1 | 1982 |
| Barium | MR | 1 | 1982 |
Violation Count vs. the National Corpus
Big Mesa Water Mdwca has 332 recorded EPA violations, 92% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 8% carry more. 25% of this system's own violations are health-based (82 of 332), 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)
332 Higher than most more violations than 92% 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 Big Mesa Water Mdwca
82 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for NM3573725.
Sources: EPA SDWIS
Nationwide peers
332 violations · 250 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 Big Mesa Water 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.