Community Water System · PWS AZ0414080
Cs Tierra Mesa Estates Water Company
Operator location Des Peres, Arizona - 26% of 284 violations are health-based (upper-third health share (> 23%)); groundwater source; 632 served per SDWIS.
- 632
- People served (this PWS)
- 284
- EPA violations (this PWS)
- 75
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Cs Tierra Mesa Estates Water Company standing, high SDWIS violation third
26% of 284 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 26% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #25,600 of 29,740 among systems serving 500+.
The verdict
Cs Tierra Mesa Estates Water Company sits in the upper third of the sitemap cohort by violation count (284), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (632; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 26% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #25,600 of 29,740
- Population · /systems
- #357 of 413
- Population · AZ
- 284
- Total EPA violations on record
- 26%
- 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
- 247
- County
- Yuma
- School/Daycare
- No
- MCL Violations
- 75
- Monitoring Violations
- 157
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Uranium | MCL | 74 | 2025 |
| Lead and Copper Rule | MR | 26 | 2022 |
| Public Notice | Other | 24 | 2025 |
| Coliform (TCR) | MR | 21 | 2015 |
| Consumer Confidence Rule | Other | 18 | 2021 |
| Combined Uranium | MR | 12 | 2025 |
| Nitrate | MR | 12 | 2004 |
| Revised Total Coliform Rule | MON | 6 | 2024 |
| Endrin | MR | 3 | 2001 |
| E. COLI | MR | 2 | 2016 |
| 1,2,4-Trichlorobenzene | MR | 2 | 2002 |
| Xylenes, Total | MR | 2 | 2002 |
| 1,1-Dichloroethylene | MR | 2 | 2002 |
| 1,2-Dichloroethane | MR | 2 | 2002 |
| 1,1,1-Trichloroethane | MR | 2 | 2002 |
| 1,1,2-Trichloroethane | MR | 2 | 2002 |
| Toluene | MR | 2 | 2002 |
| Styrene | MR | 2 | 2002 |
| DICHLOROMETHANE | MR | 2 | 2002 |
| o-Dichlorobenzene | MR | 2 | 2002 |
| trans-1,2-Dichloroethylene | MR | 2 | 2002 |
| Carbon tetrachloride | MR | 2 | 2002 |
| Benzene | MR | 2 | 2002 |
| Endothall | MR | 2 | 2001 |
| Ethylbenzene | MR | 2 | 2002 |
| cis-1,2-Dichloroethylene | MR | 2 | 2002 |
| Thallium, Total | MR | 1 | 1998 |
| Nickel | MR | 1 | 1998 |
| Barium | MR | 1 | 1998 |
| Chromium | MR | 1 | 1998 |
Violation Count vs. the National Corpus
Cs Tierra Mesa Estates Water Company has 284 recorded EPA violations, 90% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 10% carry more. 26% of this system's own violations are health-based (75 of 284), and it ranks #25,600 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)
284 Higher than most more violations than 90% 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 |
|---|---|---|---|---|
| PFTrDA | 9/12/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| 8:2 FTS | 9/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 9/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 9/12/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 9/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 4:2 FTS | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 9/12/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFBA | 9/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NEtFOSAA | 9/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 9/12/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 6:2 FTS | 9/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 9/12/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| ADONA | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 9/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxA | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 9/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 9/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 9/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 9/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/12/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| HFPO-DA | 3/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 3/20/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFPeS | 3/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFEESA | 3/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 3/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 3/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 3/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 3/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 3/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 3/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 3/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 3/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 3/20/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 3/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 3/20/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 3/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 3/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 3/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 3/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 3/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 3/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
Health-based violations on Cs Tierra Mesa Estates Water Company
75 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for AZ0414080.
Sources: EPA SDWIS · Arizona DEQ, Drinking Water Program
Nationwide peers
284 violations · 632 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 Cs Tierra Mesa Estates 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.