Community Water System · PWS NM3501021
Chama Water System
Operator location Chama, New Mexico - upper-third violation load (> 74 violations) with 425 EPA violations; surface water source; 1,573 served (PWS-level, not municipal population).
- 1,573
- People served (this PWS)
- 425
- EPA violations (this PWS)
- 40
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Chama Water System standing, high SDWIS violation third
425 EPA SDWIS violations on record - upper-third violation load (> 74 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 9% is middle-third health share (≤ 23%). Population rank #15,520 of 29,740 among systems serving 500+.
The verdict
Chama Water System sits in the upper third of the sitemap cohort by violation count (425), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,573 (mid served population (≤ 3,309)). Health-based share is 9% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #15,520 of 29,740
- Population · /systems
- #115 of 215
- Population · NM
- 425
- Total EPA violations on record
- 9%
- Health-based (MCL / treatment failure)
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
- 550
- County
- Rio Arriba
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 313
- Treatment Tech Violations
- 34
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 52 | 2023 |
| Interim Enhanced Surface Water Treatment Rule | MR | 49 | 2023 |
| TTHM | MR | 48 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 47 | 2022 |
| Coliform (TCR) | MR | 39 | 2014 |
| Interim Enhanced Surface Water Treatment Rule | TT | 34 | 2023 |
| CARBON, TOTAL | MR | 32 | 2020 |
| Public Notice | Other | 30 | 2024 |
| Lead and Copper Rule | MR | 8 | 2018 |
| Long Term 2 Enhanced Surface Water Treatment Rule | Other | 8 | 2020 |
| E. COLI | MR | 6 | 2009 |
| Coliform (TCR) | MCL | 6 | 1997 |
| Consumer Confidence Rule | Other | 5 | 2023 |
| CYANIDE | MR | 1 | 2007 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2007 |
| cis-1,2-Dichloroethylene | MR | 1 | 2007 |
| Xylenes, Total | MR | 1 | 2007 |
| o-Dichlorobenzene | MR | 1 | 2007 |
| Vinyl chloride | MR | 1 | 2007 |
| 1,1-Dichloroethylene | MR | 1 | 2007 |
| trans-1,2-Dichloroethylene | MR | 1 | 2007 |
| 1,1,1-Trichloroethane | MR | 1 | 2007 |
| Carbon tetrachloride | MR | 1 | 2007 |
| Trichloroethylene | MR | 1 | 2007 |
| 1,1,2-Trichloroethane | MR | 1 | 2007 |
| CHLOROBENZENE | MR | 1 | 2007 |
| Ethylbenzene | MR | 1 | 2007 |
| Arsenic | MR | 1 | 2007 |
| Barium | MR | 1 | 2007 |
| Chromium | MR | 1 | 2007 |
Violation Count vs. the National Corpus
Chama Water System has 425 recorded EPA violations, 94% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 6% carry more. 9% of this system's own violations are health-based (40 of 425), and it ranks #15,520 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
425 Higher than most more violations than 94% 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
SDWIS compliance record for Chama Water System
425 violations on record for NM3501021; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS
Nationwide peers
425 violations · 1,573 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.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Chama Water System
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.