Non-Transient Non-Community Water System · PWS AZ0420213
Tucson Medical Center
Operator location Tucson, Arizona - upper-third violation load (> 74 violations) with 153 EPA violations; groundwater source; 3,000 served (PWS-level, not municipal population).
- 3,000
- People served (this PWS)
- 153
- EPA violations (this PWS)
- 7
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Tucson Medical Center standing, high SDWIS violation third
153 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 5% is middle-third health share (≤ 23%). Population rank #10,590 of 29,740 among systems serving 500+.
The verdict
Tucson Medical Center sits in the upper third of the sitemap cohort by violation count (153), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 3,000 (mid served population (≤ 3,309)). Health-based share is 5% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #10,590 of 29,740
- Population · /systems
- #156 of 413
- Population · AZ
- 153
- Total EPA violations on record
- 5%
- 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
- Non-Transient Non-Community
- Owner Type
- Public/Private
- Connections
- 2
- County
- Pima
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 136
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 25 | 2015 |
| Chlorine | MR | 13 | 2023 |
| Selenium | MR | 9 | 1980 |
| Nitrate | MR | 8 | 2004 |
| Lead and Copper Rule | MR | 7 | 2020 |
| TTHM | MR | 7 | 2025 |
| Total Haloacetic Acids (HAA5) | MR | 7 | 2025 |
| Revised Total Coliform Rule | RPT | 4 | 2022 |
| LEAD AND COPPER RULE REVISIONS | TT | 4 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 4 | 2024 |
| Coliform (TCR) | MCL | 3 | 2015 |
| BHC-GAMMA | MR | 2 | 1998 |
| Methoxychlor | MR | 2 | 1998 |
| Toxaphene | MR | 2 | 1998 |
| Dalapon | MR | 2 | 1998 |
| Diquat | MR | 2 | 1998 |
| Endothall | MR | 2 | 1998 |
| Glyphosate | MR | 2 | 1998 |
| Di(2-ethylhexyl) adipate | MR | 2 | 1998 |
| OXAMYL | MR | 2 | 1998 |
| Di(2-ethylhexyl) phthalate | MR | 2 | 1998 |
| Picloram | MR | 2 | 1998 |
| Dinoseb | MR | 2 | 1998 |
| Hexachlorocyclopentadiene | MR | 2 | 1998 |
| Carbofuran | MR | 2 | 1998 |
| Atrazine | MR | 2 | 1998 |
| LASSO | MR | 2 | 1998 |
| Heptachlor | MR | 2 | 1998 |
| Heptachlor epoxide | MR | 2 | 1998 |
| 2,4-D | MR | 2 | 1998 |
Violation Count vs. the National Corpus
Tucson Medical Center has 153 recorded EPA violations, 81% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 19% carry more. 5% of this system's own violations are health-based (7 of 153), and it ranks #10,590 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)
153 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 Tucson Medical Center
153 violations on record for AZ0420213; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS · Arizona DEQ, Drinking Water Program
Nationwide peers
153 violations · 3,000 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 Tucson Medical Center
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.