Marygold Mwc
EPA ID: CA3610028 · 3,055 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Marygold Mwc (CA3610028): 1 EPA violation in the last five years. Records for Marygold Mwc show 1 violation over the monitored period, with every finding addressed and officially closed - the provider, which serves approximately 3,055 people, carries no outstanding enforcement actions in the current EPA dataset and meets all applicable drinking water requirements.
Data: EPA SDWIS
Service Area Map
Coverage area for Marygold Mwc Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Marygold Mwc serves a community with a median household income of $78,658 and an estimated 127,204 residents across its service area. Approximately 70% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 51% 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?
Marygold Mwc'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 Marygold Mwc compares to EPA limits
What This Means For You
Lead at 1 mg/L (action level) exceeds the EPA maximum of 0.015 mg/L (action level). Brain damage in children, kidney & blood pressure in adults. Consider reverse osmosis filtration.
Lead was detected in this water system. reverse osmosis filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
Similar-sized systems in California
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
Marygold Mwc (EPA ID: CA3610028) is a community water system in California that serves approximately 3,055 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 0 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 |
|---|---|---|---|
| January 1, 2025 | Lead | Non-health-based | Archived |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Lead | Inorganic | 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 CA 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 Marygold Mwc (CA3610028) on EPA.gov.
Frequently Asked Questions
Is Marygold Mwc water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Marygold Mwc; its 1 accepted 2021-2026 record are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Marygold Mwc serve?
Marygold Mwc serves approximately 3,055 people across 2 ZIP codes in California.
Where does Marygold Mwc get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Marygold Mwc (CA): 1 EPA Violation. https://zipcheckup.com/water-system/ca3610028/
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author = {{ZipCheckup}},
title = {{Marygold Mwc (CA): 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ca3610028/}
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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
Marygold Mwc (EPA ID: CA3610028) - request the latest Consumer Confidence Report or ask about specific contaminants.