Gw Santa Cruz Water Company
EPA ID: AZ0411131 · 84,000 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Gw Santa Cruz Water Company (AZ0411131): 1 past health-based violation, since resolved. In the five-year tracking period, Gw Santa Cruz Water Company filed 74 violations - each has been cleared, and the utility now meets all federal standards for its 84,000 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Gw Santa Cruz Water Company Source: EPA SDWIS service area boundaries.
Service area boundary - Grade C
Service Area Demographics
The Gw Santa Cruz Water Company serves a community with a median household income of $89,663 and an estimated 71,864 residents across its service area.
Environmental Justice Note: 43% 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?
Gw Santa Cruz 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.
Infrastructure Risk
Detected Contaminants
How Gw Santa Cruz Water Company compares to EPA limits
What This Means For You
Contaminant 2015 at 1 mg/L exceeds the EPA maximum of 0.0005 mg/L. Probable carcinogen; liver & thyroid damage, immune suppression. Consider granular activated carbon (GAC) filtration.
Mercury at 2 mg/L exceeds the EPA maximum of 0.002 mg/L. Kidney damage, neurological impairment. Consider activated carbon (GAC) filtration.
Cadmium at 2 mg/L exceeds the EPA maximum of 0.005 mg/L. Kidney damage accumulating over lifetime; probable carcinogen. Consider reverse osmosis filtration.
Atrazine at 1 mg/L exceeds the EPA maximum of 0.003 mg/L. Endocrine disruption, cardiovascular & reproductive effects. Consider granular activated carbon (GAC) filtration.
Benzene at 1 mg/L exceeds the EPA maximum of 0.005 mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 2 detections recorded.
Contaminant 2015 was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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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
Gw Santa Cruz Water Company (EPA ID: AZ0411131) is a community water system in Arizona that serves approximately 84,000 people from groundwater sources.
This system provides water to 2 ZIP codes across 1 community.
ZIP-Area Home Safety Context: C (58/100)
This is the average Home Safety Score for 2 of 2 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Status breakdown for accepted records with record years 2021-2026: 73 resolved, 1 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 |
|---|---|---|---|
| November 1, 2025 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| November 1, 2025 | Revised Total Coliform Rule | Non-health-based | Archived |
| August 1, 2025 | Consumer Confidence Report Rule | Health-based | Resolved |
| July 19, 2025 | Lead and Copper Rule | Non-health-based | Resolved |
| July 19, 2025 | Lead and Copper Rule | Non-health-based | Resolved |
| July 19, 2025 | Lead and Copper Rule | Non-health-based | Resolved |
| July 19, 2025 | Lead and Copper Rule | Non-health-based | Resolved |
| April 1, 2024 | Haloacetic Acids (HAA5) | Non-health-based | Resolved |
| April 1, 2024 | Total Trihalomethanes (TTHM) | Non-health-based | Resolved |
| October 1, 2023 | Gross Alpha | Non-health-based | Resolved |
| October 1, 2023 | Combined Radium | Non-health-based | Resolved |
| October 1, 2023 | Gross Beta | Non-health-based | Resolved |
| October 1, 2023 | Radium-226 | Non-health-based | Resolved |
| October 1, 2023 | Radium-228 | Non-health-based | Resolved |
| September 1, 2023 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| July 1, 2023 | Radium-228 | Non-health-based | Resolved |
| July 1, 2023 | Gross Alpha | Non-health-based | Resolved |
| July 1, 2023 | Gross Beta | Non-health-based | Resolved |
| July 1, 2023 | Radium-226 | Non-health-based | Resolved |
| March 1, 2021 | Haloacetic Acids (HAA5) | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Lead and Copper Rule | Treatment Failure | 4 | No |
| Consumer Confidence Report Rule | Reporting Failure | 3 | Yes |
| Barium | Inorganic | 2 | No |
| Cadmium | Inorganic | 2 | No |
| Chromium | Inorganic | 2 | No |
| Fluoride | Inorganic | 2 | No |
| Selenium | Inorganic | 2 | No |
| Nickel | Inorganic | 2 | No |
| Nitrite | Inorganic | 2 | No |
| Contaminant 1036 | Other Violation | 2 | No |
| Contaminant 1045 | Other Violation | 2 | No |
| Mercury | Inorganic | 2 | No |
| Contaminant 1075 | Other Violation | 2 | No |
| Contaminant 1085 | Other Violation | 2 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 2 | 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.
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Gw Santa Cruz Water Company (AZ0411131) on EPA.gov.
Frequently Asked Questions
Is Gw Santa Cruz Water Company water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Gw Santa Cruz Water Company; its 74 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Gw Santa Cruz Water Company serve?
Gw Santa Cruz Water Company serves approximately 84,000 people across 2 ZIP codes in Arizona.
Where does Gw Santa Cruz 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 →
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Gw Santa Cruz Water Company (AZ): 1 Health Violation. https://zipcheckup.com/water-system/az0411131/
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title = {{Gw Santa Cruz Water Company (AZ): 1 Health Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/az0411131/}
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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
Gw Santa Cruz Water Company (EPA ID: AZ0411131) - request the latest Consumer Confidence Report or ask about specific contaminants.