Community Water System · PWS AZ0410101
Samalayuca Improvement Assoc
Operator location Tucson, Arizona - smaller served population (≤ 999) at 150 people served; 100 SDWIS violations on record from groundwater sources.
- 150
- People served (this PWS)
- 100
- EPA violations (this PWS)
- 1
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Samalayuca Improvement Assoc standing, high SDWIS violation third
150 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 1% is middle-third health share (≤ 23%).
The verdict
Samalayuca Improvement Assoc sits in the upper third of the sitemap cohort by violation count (100), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (150; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 1% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 100
- Total EPA violations on record
- 1%
- Health-based (MCL / treatment failure)
- 150
- 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
- Public/Private
- Connections
- 51
- County
- Pima
- School/Daycare
- No
- MCL Violations
- 1
- Monitoring Violations
- 79
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 19 | 2016 |
| Coliform (TCR) | MR | 18 | 2013 |
| Consumer Confidence Rule | Other | 10 | 2014 |
| Lead and Copper Rule | MR | 5 | 2017 |
| Nitrate | MR | 3 | 2008 |
| Coliform (TCR) | MCL | 1 | 2003 |
| DICHLOROMETHANE | MR | 1 | 1998 |
| o-Dichlorobenzene | MR | 1 | 1998 |
| p-Dichlorobenzene | MR | 1 | 1998 |
| trans-1,2-Dichloroethylene | MR | 1 | 1998 |
| 1,2-Dichloroethane | MR | 1 | 1998 |
| 1,1,1-Trichloroethane | MR | 1 | 1998 |
| Trichloroethylene | MR | 1 | 1998 |
| 1,1,2-Trichloroethane | MR | 1 | 1998 |
| CHLOROBENZENE | MR | 1 | 1998 |
| Toluene | MR | 1 | 1998 |
| Styrene | MR | 1 | 1998 |
| Di(2-ethylhexyl) adipate | MR | 1 | 1998 |
| Simazine | MR | 1 | 1998 |
| Picloram | MR | 1 | 1998 |
| Dinoseb | MR | 1 | 1998 |
| Atrazine | MR | 1 | 1998 |
| Benzo(a)pyrene | MR | 1 | 1998 |
| Revised Total Coliform Rule | RPT | 1 | 2018 |
| 1,2-Dichloropropane | MR | 1 | 1998 |
| LASSO | MR | 1 | 1998 |
| Ethylbenzene | MR | 1 | 1998 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 1998 |
| Xylenes, Total | MR | 1 | 1998 |
| Tetrachloroethylene | MR | 1 | 1998 |
Violation Count vs. the National Corpus
Samalayuca Improvement Assoc has 100 recorded EPA violations, 73% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 27% carry more. 1% of this system's own violations are health-based (1 of 100), 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)
100 Around the middle fewer violations than 27% 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
Population served record for Samalayuca Improvement Assoc
EPA SDWIS lists 150 people served and 51 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · Arizona DEQ, Drinking Water Program
Nationwide peers
100 violations · 150 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 Samalayuca Improvement Assoc
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Arizona compares on the same EPA violation measures. Arizona 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.