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THOUSAND TRAILS SAN BENITO PRESERVE

PWS ID: CA3500505 · PAICINES, California 95043

THOUSAND TRAILS SAN BENITO PRESERVE serves 1,017 people in PAICINES, California using Groundwater water sources. It has 77 recorded EPA violations, including 32 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: THOUSAND TRAILS SAN BENITO PRESERVE

THOUSAND TRAILS SAN BENITO PRESERVE is a private-owned community water system that delivers drinking water to 1,017 residents in PAICINES, California (San Benito County) through 365 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 77 total violations for this system , of which 32 (42%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 39 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 28 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 38.7 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across California, EPA tracks 7,249 public water systems serving 42,404,883 people, with 153,308 cumulative violations and 63,983 health-based violations on record. About 89% of systems in the state carry at least one violation, and state-wide the average per system is 21.1 violations. THOUSAND TRAILS SAN BENITO PRESERVE's 77 violations sit above the California average. Statewide, 447 of 694 UCMR5-tested systems have reported PFAS detections (64.4%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
1,017
Total Violations
77
Health-Based Violations
32
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
365
County
San Benito
School/Daycare
No
MCL Violations
30
Monitoring Violations
39
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 28 2015
Coliform (TCR) MR 14 2009
E. COLI MR 12 2016
Revised Total Coliform Rule MON 9 2025
Public Notice Other 5 2006
Nitrate MR 4 2007
Fluoride MCL 2 2019
Revised Total Coliform Rule TT 2 2023

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFTrDA 6/27/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFUnA 6/27/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 6/27/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 6/27/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 6/27/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 6/27/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 6/27/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFHxS 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 6/27/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 6/27/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFPeS 6/27/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 6/27/2023 38.5000 µg/L 9 µg/L Detected
PFMBA 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 6/27/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFPeA 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 6/27/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 6/27/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 6/27/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 6/27/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 6/27/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 6/27/2023 <0.02 µg/L 0.02 µg/L Not Detected
ADONA 6/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 4/4/2023 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 4/4/2023 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 4/4/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 4/4/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 4/4/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 4/4/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 4/4/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFUnA 4/4/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHpA 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 4/4/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 4/4/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFBA 4/4/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 4/4/2023 38.7000 µg/L 9 µg/L Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for THOUSAND TRAILS SAN BENITO PRESERVE.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID CA3500505 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

California Drinking Water Authority

California State Water Resources Control Board — Division of Drinking Water is the primacy agency that licenses and inspects THOUSAND TRAILS SAN BENITO PRESERVE under EPA-delegated authority.

Open CA regulator portal

Source: California State Water Resources Control Board — Division of Drinking Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 Revised Total Coliform Rule MON 9 SDWIS / CA3500505 / 8000
2023 Revised Total Coliform Rule TT 2 SDWIS / CA3500505 / 8000
2019 Fluoride MCL 2 SDWIS / CA3500505 / 1025
2016 E. COLI MR 12 SDWIS / CA3500505 / 3014
2015 Coliform (TCR) MCL 28 SDWIS / CA3500505 / 3100
2009 Coliform (TCR) MR 14 SDWIS / CA3500505 / 3100
2007 Nitrate MR 4 SDWIS / CA3500505 / 1040
2006 Public Notice Other 5 SDWIS / CA3500505 / 7500

How THOUSAND TRAILS SAN BENITO PRESERVE Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric THOUSAND TRAILS SAN BENITO PRESERVE California avg Federal benchmark
Total violations 77 21.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 32 8.8 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 64.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,017 5,850 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 7,249 regulated public water systems in California.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is THOUSAND TRAILS SAN BENITO PRESERVE water safe to drink? ▼
THOUSAND TRAILS SAN BENITO PRESERVE (PWS ID: CA3500505) has 77 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 1,017 people using Groundwater sources.
How many people does THOUSAND TRAILS SAN BENITO PRESERVE serve? ▼
THOUSAND TRAILS SAN BENITO PRESERVE serves 1,017 people in PAICINES, California. It is a Private-owned system using Groundwater water sources with 365 service connections.
What type of violations does THOUSAND TRAILS SAN BENITO PRESERVE have? ▼
THOUSAND TRAILS SAN BENITO PRESERVE has 77 total violations: 32 health-based violations (MCL exceedances or treatment failures), 39 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in THOUSAND TRAILS SAN BENITO PRESERVE water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in THOUSAND TRAILS SAN BENITO PRESERVE's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does THOUSAND TRAILS SAN BENITO PRESERVE use? ▼
THOUSAND TRAILS SAN BENITO PRESERVE uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial