Community Water System · PWS AZ0411076
Arizona Water Co - Tierra Grande
Operator location Phoenix, Arizona - 17% of 23 violations are health-based (middle-third health share (≤ 23%)); groundwater source; 1,796 served per SDWIS.
- 1,796
- People served (this PWS)
- 23
- EPA violations (this PWS)
- 4
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Arizona Water Co - Tierra Grande standing, mid SDWIS violation third
17% of 23 recorded violations are health-based - middle-third health share (≤ 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 17% is middle-third health share (≤ 23%). Population rank #14,519 of 29,740 among systems serving 500+.
The verdict
Arizona Water Co - Tierra Grande lands in the middle third by violation volume (23), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 1,796 (mid served population (≤ 3,309)). Health-based share is 17% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #14,519 of 29,740
- Population · /systems
- #202 of 413
- Population · AZ
- 23
- Total EPA violations on record
- 17%
- 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
- Public/Private
- Connections
- 374
- County
- Pinal
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 12
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 5 | 2008 |
| Chlorine | MR | 4 | 2015 |
| LEAD AND COPPER RULE REVISIONS | RPT | 4 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 4 | 2024 |
| Lead and Copper Rule | MR | 2 | 2014 |
| Revised Total Coliform Rule | RPT | 2 | 2020 |
| Nitrate | MR | 1 | 2001 |
| Consumer Confidence Rule | Other | 1 | 2002 |
Violation Count vs. the National Corpus
Arizona Water Co - Tierra Grande has 23 recorded EPA violations, 35% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 64% carry more. 17% of this system's own violations are health-based (4 of 23), and it ranks #14,519 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)
23 Lower than most fewer violations than 64% 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
Health-based violations on Arizona Water Co - Tierra Grande
4 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for AZ0411076.
Sources: EPA SDWIS · Arizona DEQ, Drinking Water Program
Nationwide peers
23 violations · 1,796 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
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 Arizona Water Co - Tierra Grande
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.