Community Water System · PWS AZ0410127
Spanish Trail Water Company
Operator location Tucson, Arizona - larger served population (> 3,309) at 3,822 people served; 228 SDWIS violations on record from groundwater sources.
- 3,822
- People served (this PWS)
- 228
- EPA violations (this PWS)
- 4
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Spanish Trail Water Company standing, high SDWIS violation third
3,822 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 2% is middle-third health share (≤ 23%). Population rank #9,138 of 29,740 among systems serving 500+.
The verdict
Spanish Trail Water Company sits in the upper third of the sitemap cohort by violation count (228), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (3,822; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 2% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #9,138 of 29,740
- Population · /systems
- #136 of 413
- Population · AZ
- 228
- Total EPA violations on record
- 2%
- 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
- 1,566
- County
- Pima
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 208
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 18 | 2015 |
| Consumer Confidence Rule | Other | 8 | 2018 |
| TTHM | MR | 6 | 2021 |
| Xylenes, Total | MR | 6 | 2002 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2021 |
| Chlorine | MR | 5 | 2024 |
| Lead and Copper Rule | MR | 5 | 2023 |
| Public Notice | Other | 4 | 2022 |
| Coliform (TCR) | MCL | 4 | 2004 |
| Carbofuran | MR | 3 | 1998 |
| Atrazine | MR | 3 | 1998 |
| LASSO | MR | 3 | 1998 |
| 2,3,7,8-TCDD | MR | 3 | 1998 |
| Heptachlor | MR | 3 | 1998 |
| Total Polychlorinated Biphenyls (PCB) | MR | 3 | 1998 |
| Chlordane | MR | 3 | 1998 |
| BHC-GAMMA | MR | 3 | 1998 |
| Methoxychlor | MR | 3 | 1998 |
| Toxaphene | MR | 3 | 1998 |
| Dalapon | MR | 3 | 1998 |
| Diquat | MR | 3 | 1998 |
| Endothall | MR | 3 | 1998 |
| OXAMYL | MR | 3 | 1998 |
| Simazine | MR | 3 | 1998 |
| Dinoseb | MR | 3 | 1998 |
| Hexachlorocyclopentadiene | MR | 3 | 1998 |
| Heptachlor epoxide | MR | 3 | 1998 |
| 2,4-D | MR | 3 | 1998 |
| 2,4,5-TP | MR | 3 | 1998 |
| ETHYLENE DIBROMIDE | MR | 3 | 1998 |
Violation Count vs. the National Corpus
Spanish Trail Water Company has 228 recorded EPA violations, 87% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 13% carry more. 2% of this system's own violations are health-based (4 of 228), and it ranks #9,138 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)
228 Higher than most more violations than 87% 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 Spanish Trail Water Company
EPA SDWIS lists 3,822 people served and 1,566 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
228 violations · 3,822 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 similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Spanish Trail Water Company
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.