Community Water System · PWS NN0436008
Greasewood Springs Community Boarding School BIA
Operator location Ganado, Navajo Nation - smaller served population (≤ 999) at 720 people served; 216 SDWIS violations on record from groundwater sources.
- 720
- People served (this PWS)
- 216
- EPA violations (this PWS)
- 15
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Greasewood Springs Community Boarding School BIA standing, high SDWIS violation third
720 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 7% is middle-third health share (≤ 23%). UCMR5: UCMR5 tested, none detected. Population rank #23,961 of 29,740 among systems serving 500+.
The verdict
Greasewood Springs Community Boarding School BIA sits in the upper third of the sitemap cohort by violation count (216), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (720; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 7% (middle-third health share (≤ 23%)). UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #23,961 of 29,740
- Population · /systems
- #70 of 82
- Population · NN
- 216
- Total EPA violations on record
- 7%
- 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
- Federal
- Connections
- 81
- School/Daycare
- Yes
- MCL Violations
- 15
- Monitoring Violations
- 173
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Barium | MCL | 13 | 2013 |
| Coliform (TCR) | MR | 12 | 2012 |
| Total Haloacetic Acids (HAA5) | MR | 10 | 2016 |
| TTHM | MR | 8 | 2016 |
| Barium | MR | 7 | 2024 |
| Consumer Confidence Rule | Other | 6 | 2024 |
| 2,3,7,8-TCDD | MR | 6 | 2008 |
| Nitrate | MR | 5 | 2024 |
| Nitrite | MR | 5 | 2024 |
| Fluoride | MR | 4 | 2008 |
| Revised Total Coliform Rule | MON | 4 | 2025 |
| Revised Total Coliform Rule | RPT | 4 | 2025 |
| Revised Total Coliform Rule | Other | 3 | 2016 |
| Public Notice | Other | 3 | 2025 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 3 | 2013 |
| Methoxychlor | MR | 2 | 2004 |
| Toxaphene | MR | 2 | 2004 |
| Dalapon | MR | 2 | 2004 |
| Diquat | MR | 2 | 2004 |
| Endothall | MR | 2 | 2004 |
| OXAMYL | MR | 2 | 2004 |
| Di(2-ethylhexyl) phthalate | MR | 2 | 2004 |
| Hexachlorocyclopentadiene | MR | 2 | 2004 |
| Aldicarb sulfoxide | MR | 2 | 2004 |
| Carbofuran | MR | 2 | 2004 |
| Aldicarb | MR | 2 | 2004 |
| LASSO | MR | 2 | 2004 |
| Heptachlor epoxide | MR | 2 | 2004 |
| Benzo(a)pyrene | MR | 2 | 2004 |
| 1,2,4-Trichlorobenzene | MR | 2 | 2004 |
Violation Count vs. the National Corpus
Greasewood Springs Community Boarding School BIA has 216 recorded EPA violations, 86% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 14% carry more. 7% of this system's own violations are health-based (15 of 216), and it ranks #23,961 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)
216 Higher than most more violations than 86% 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
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NEtFOSAA | 8/21/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 8/21/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTrDA | 8/21/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 8/21/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/31/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 7/31/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 7/31/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 7/31/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 7/31/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBS | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 7/31/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFEESA | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 7/31/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| ADONA | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 7/31/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMPA | 7/31/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 7/31/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 7/31/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 7/31/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 7/31/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 7/31/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTA | 2/21/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 2/21/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 2/21/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 2/21/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFHxS | 12/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 12/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 12/12/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFNA | 12/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 12/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 12/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 12/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 12/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 12/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 12/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 12/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 12/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 12/12/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFMBA | 12/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 12/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 12/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 12/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
Population served record for Greasewood Springs Community Boarding School BIA
EPA SDWIS lists 720 people served and 81 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
216 violations · 720 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 with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Greasewood Springs Community Boarding School B…
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Navajo Nation compares on the same EPA violation measures. Navajo Nation 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.