Sundale Mutual Water Company A, B
EPA ID: CA1900563 · 1,050 people served · 7 ZIP codes
Although compliance varies widely among water utilities nationally, Sundale Mutual Water Company A, B stands out with zero EPA violations over five consecutive monitoring years, delivering safe tap water to 1,050 residents and showing no enforcement activity across the entire reporting span.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 30 (2022) to 27 (2025). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Sundale Mutual Water Company A, B Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Sundale Mutual Water Company A, B serves a community with a median household income of $71,097 and an estimated 216,318 residents across its service area. Approximately 51% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 52% 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?
Sundale Mutual Water Company A, B'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.
About 2% of homes in Los Angeles County, California rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 64th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
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
Sundale Mutual Water Company A, B (EPA ID: CA1900563) is a community water system in California that serves approximately 1,050 people from groundwater sources.
This system provides water to 7 ZIP codes across 2 communities.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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: 3 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 4 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 93534 — Lancaster
- 93535 — Lancaster
- 93536 — Lancaster
- 93539 — Lancaster
- 93560 — Rosamond
- 93584 — Lancaster
- 93586 — Lancaster
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Sundale Mutual Water Company A, B (CA1900563) on EPA.gov.
Frequently Asked Questions
Is Sundale Mutual Water Company A, B water safe to drink?
Based on EPA records, Sundale Mutual Water Company A, B has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Sundale Mutual Water Company A, B serve?
Sundale Mutual Water Company A, B serves approximately 1,050 people across 7 ZIP codes in California.
Where does Sundale Mutual Water Company A, B get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.