Community Water System · PWS NM3511001
Sandia Knolls Water System
Operator location Elephant Butte, New Mexico - upper-third violation load (> 74 violations) with 151 EPA violations; groundwater source; 1,098 served (PWS-level, not municipal population).
- 1,098
- People served (this PWS)
- 151
- EPA violations (this PWS)
- 24
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Sandia Knolls Water System standing, high SDWIS violation third
151 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 16% is middle-third health share (≤ 23%). Population rank #18,660 of 29,740 among systems serving 500+.
The verdict
Sandia Knolls Water System sits in the upper third of the sitemap cohort by violation count (151), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,098 (mid served population (≤ 3,309)). Health-based share is 16% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #18,660 of 29,740
- Population · /systems
- #147 of 215
- Population · NM
- 151
- Total EPA violations on record
- 16%
- 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
- Private
- Connections
- 446
- County
- Bernalillo
- School/Daycare
- No
- MCL Violations
- 15
- Monitoring Violations
- 98
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 32 | 2008 |
| Coliform (TCR) | MR | 29 | 2005 |
| Chlorine | MR | 27 | 2006 |
| Coliform (TCR) | MCL | 15 | 2004 |
| Nitrate-Nitrite | MR | 10 | 2008 |
| Consumer Confidence Rule | Other | 7 | 2006 |
| Lead and Copper Rule | TT | 5 | 2004 |
| Public Notice | Other | 5 | 2006 |
| Groundwater Rule | TT | 4 | 2023 |
| Coliform (TCR) | Other | 3 | 2004 |
Violation Count vs. the National Corpus
Sandia Knolls Water System has 151 recorded EPA violations, 81% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 19% carry more. 16% of this system's own violations are health-based (24 of 151), and it ranks #18,660 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)
151 Higher than most more violations than 81% 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 Sandia Knolls Water System
151 violations on record for NM3511001; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS
Nationwide peers
151 violations · 1,098 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 Sandia Knolls 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.