Vallecitos Water District
EPA ID: CA3710002 · 113,500 people served · 10 ZIP codes
The EPA enforcement database lists 28 active violations for Vallecitos Water District — a provider that delivers drinking water to approximately 113,500 people and has not yet formally resolved those findings.
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 12 (2021) to 8 (2023). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Vallecitos Water District Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Vallecitos Water District serves a community with a median household income of $108,784 and an estimated 348,641 residents across its service area. Approximately 52% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Vallecitos Water District's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
About 1% of homes in San Diego County, California rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Vallecitos Water District compares to EPA limits
What This Means For You
Lead at 2 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.
Nickel at 24 mg/L (secondary standard: 2.0 mg/L) exceeds the EPA maximum of 4 mg/L (secondary standard: 2.0 mg/L). Tooth & bone damage at high levels. Consider reverse osmosis filtration.
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Stage 2 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 6 detections recorded. 1 exceeds federal EPA limits (4 ppt for PFOA/PFOS).
Lead was detected in this water system. reverse osmosis 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
Vallecitos Water District (EPA ID: CA3710002) is a community water system in California that serves approximately 113,500 people from surface water sources.
This system provides water to 10 ZIP codes across 5 communities.
Average Home Safety Score: C (69/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 2, 2025 | Stage 2 DBP Rule | Monitoring | Unresolved |
| August 1, 2024 | Lead | Monitoring | Unresolved |
| July 1, 2024 | Nickel | Monitoring | Unresolved |
| April 1, 2024 | Nickel | Monitoring | Unresolved |
| February 1, 2024 | Nickel | Monitoring | Unresolved |
| January 1, 2024 | Nickel | Monitoring | Unresolved |
| December 1, 2023 | Nickel | Monitoring | Unresolved |
| November 1, 2023 | Nickel | Monitoring | Unresolved |
| October 31, 2023 | Nickel | Monitoring | Unresolved |
| October 1, 2023 | Stage 1 DBP Rule | Monitoring | Unresolved |
| October 1, 2023 | Nickel | Monitoring | Unresolved |
| September 1, 2023 | Nickel | Monitoring | Unresolved |
| August 1, 2023 | Lead | Monitoring | Unresolved |
| July 1, 2023 | Nickel | Monitoring | Unresolved |
| April 1, 2023 | Nickel | Health-based | Unresolved |
| April 1, 2023 | Nickel | Monitoring | Unresolved |
| January 1, 2023 | Nickel | Health-based | Unresolved |
| January 1, 2023 | Nickel | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Nickel | Inorganic | 24 | Yes |
| Lead | Inorganic | 2 | No |
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
| Stage 2 DBP Rule | Treatment Failure | 1 | No |
Health Risk Details
Fluoride (EPA limit: 4 mg/L (secondary standard: 2.0 mg/L))
Tooth & bone damage at high levels At-risk groups: children under 8 during tooth development, elderly with compromised bone density, people with kidney disease.
Removal methods: reverse osmosis, activated alumina, distillation. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 92069 | 0.0011 mg/L | No | N/A |
| 92078 | 0.0011 mg/L | No | N/A |
| 92079 | 0.0011 mg/L | No | N/A |
| 92096 | 0.0011 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
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: 9 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 1 additional ZIP inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 92009 — Carlsbad
- 92024 — Encinitas
- 92026 — Escondido
- 92029 — Escondido
- 92069 — San Marcos
- 92078 — San Marcos
- 92079 — San Marcos
- 92081 — Vista
- 92084 — Vista
- 92096 — San Marcos
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Vallecitos Water District (CA3710002) on EPA.gov.
Frequently Asked Questions
Is Vallecitos Water District water safe to drink?
Vallecitos Water District has recorded 6 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Vallecitos Water District serve?
Vallecitos Water District serves approximately 113,500 people across 10 ZIP codes in California.
Where does Vallecitos Water District get its water?
The primary water source is surface water.
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 →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
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.
Frequently Asked Questions
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
Vallecitos Water District (EPA ID: CA3710002) — request the latest Consumer Confidence Report or ask about specific contaminants.