Cs Tierra Mesa Estates Water Company
EPA ID: AZ0414080 · 632 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Cs Tierra Mesa Estates Water Company (AZ0414080): 19 past health-based violations, since resolved. Past issues aside, Cs Tierra Mesa Estates Water Company cleared all 37 violations and is compliant today, supplying 632 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Cs Tierra Mesa Estates Water Company Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Cs Tierra Mesa Estates Water Company serves a community with a median household income of $68,358 and an estimated 53,149 residents across its service area.
Environmental Justice Note: 68% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Cs Tierra Mesa Estates Water Company's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Detected Contaminants
How Cs Tierra Mesa Estates Water Company compares to EPA limits
What This Means For You
Lead and Copper Rule at 9 mg/L exceeds the EPA maximum of mg/L.
Combined Radium at 23 pCi/L exceeds the EPA maximum of 5 pCi/L.
Stage 1 DBP Rule at 3 mg/L exceeds the EPA maximum of mg/L.
Surface Water Treatment Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Consumer Confidence Report Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Comparable Water Systems
Similar-sized systems in Arizona
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Cs Tierra Mesa Estates Water Company (EPA ID: AZ0414080) is a community water system in Arizona that serves approximately 632 people from groundwater sources.
This system serves ZIP code 85365 in Yuma.
Violation History
Status breakdown for accepted records with record years 2021-2026: 18 resolved, 19 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| January 1, 2026 | Combined Radium | Health-based | Archived |
| October 1, 2025 | Combined Radium | Non-health-based | Resolved |
| July 1, 2025 | Combined Radium | Health-based | Archived |
| June 28, 2025 | Lead and Copper Rule | Non-health-based | Resolved |
| June 28, 2025 | Lead and Copper Rule | Non-health-based | Resolved |
| April 1, 2025 | Combined Radium | Health-based | Archived |
| February 20, 2025 | Lead and Copper Rule | Non-health-based | Resolved |
| January 1, 2025 | Combined Radium | Non-health-based | Resolved |
| January 1, 2025 | Combined Radium | Health-based | Archived |
| November 9, 2024 | Lead and Copper Rule | Non-health-based | Resolved |
| October 1, 2024 | Combined Radium | Non-health-based | Resolved |
| July 1, 2024 | Combined Radium | Health-based | Archived |
| April 1, 2024 | Combined Radium | Health-based | Archived |
| January 1, 2024 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| January 1, 2024 | Combined Radium | Health-based | Archived |
| January 1, 2024 | Combined Radium | Non-health-based | Resolved |
| October 1, 2023 | Combined Radium | Health-based | Archived |
| July 1, 2023 | Combined Radium | Health-based | Archived |
| April 29, 2023 | Lead and Copper Rule | Non-health-based | Resolved |
| April 1, 2023 | Combined Radium | Health-based | Archived |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Combined Radium | Radionuclides | 23 | Yes |
| Lead and Copper Rule | Treatment Failure | 9 | No |
| Stage 1 DBP Rule | Treatment Failure | 3 | No |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
| Consumer Confidence Report Rule | Reporting Failure | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by AZ or modeled from parcel and building-footprint data.
- 85365 - Yuma
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Cs Tierra Mesa Estates Water Company (AZ0414080) on EPA.gov.
Frequently Asked Questions
Is Cs Tierra Mesa Estates Water Company water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Cs Tierra Mesa Estates Water Company; its 37 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Cs Tierra Mesa Estates Water Company serve?
Cs Tierra Mesa Estates Water Company serves approximately 632 people across 1 ZIP code in Arizona.
Where does Cs Tierra Mesa Estates Water Company get its water?
The primary water source is groundwater.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Cs Tierra Mesa Estates Water Company: 19 Health Violations. https://zipcheckup.com/water-system/az0414080/
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Cs Tierra Mesa Estates Water Company (EPA ID: AZ0414080) - request the latest Consumer Confidence Report or ask about specific contaminants.