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Barona

PWS ID: 090600119 · Lakeside, 09 92040

Barona serves 6,000 people in Lakeside, 09 using Groundwater water sources. It has 114 recorded EPA violations, including 18 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (2 compounds found).

Water Quality Snapshot: Barona

Barona is a native american-owned non-transient non-community water system that delivers drinking water to 6,000 residents in Lakeside, 09 through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 114 total violations for this system , of which 18 (16%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 69 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 17 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 2 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 56 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across 09, EPA tracks 323 public water systems serving 555,721 people, with 48,296 cumulative violations and 3,354 health-based violations on record. About 97% of systems in the state carry at least one violation, and state-wide the average per system is 149.5 violations. Barona's 114 violations sit below the 09 average. Statewide, 30 of 41 UCMR5-tested systems have reported PFAS detections (73.2%). 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

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

Population Served
6,000
Total Violations
114
Health-Based Violations
18
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Native American
Connections
1
School/Daycare
No
MCL Violations
18
Monitoring Violations
69
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 17 2002
Combined Uranium MCL 8 2008
Coliform (TCR) MCL 6 2004
Gross Alpha, Excl. Radon and U MCL 3 2002
Consumer Confidence Rule Other 3 2005
Endrin MR 2 1998
Toxaphene MR 2 1998
Methoxychlor MR 2 1998
LASSO MR 2 1998
Heptachlor MR 2 1998
Heptachlor epoxide MR 2 1998
2,4-D MR 2 1998
2,4,5-TP MR 2 1998
Pentachlorophenol MR 2 1998
Total Polychlorinated Biphenyls (PCB) MR 2 1998
1,2-DIBROMO-3-CHLOROPROPANE MR 2 1998
ETHYLENE DIBROMIDE MR 2 1998
Chlordane MR 2 1998
Lead and Copper Rule MR 2 1996
Atrazine MR 2 1998
Carbofuran MR 2 1998
BHC-GAMMA MR 2 1998
TTHM MCL 1 2018
Asbestos MR 1 1996
Endothall MR 1 1998
Glyphosate MR 1 1998
Di(2-ethylhexyl) adipate MR 1 1998
OXAMYL MR 1 1998
Di(2-ethylhexyl) phthalate MR 1 1998
Dinoseb MR 1 1998

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 3 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
PFBA 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/6/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/6/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/6/2024 0.0039 µg/L 0.003 µg/L Detected
4:2 FTS 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 8/6/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFUnA 8/6/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/6/2024 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
8:2 FTS 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 8/6/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 8/6/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 8/6/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/6/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/6/2024 <0.004 µg/L 0.004 µg/L Not Detected
NMeFOSAA 8/6/2024 <0.006 µg/L 0.006 µg/L Not Detected
lithium 8/6/2024 56.0000 µg/L 9 µg/L Detected
PFMPA 4/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 4/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 4/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 4/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 4/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 4/29/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 4/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 4/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 4/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 4/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 4/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 4/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 4/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 4/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 4/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 4/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 4/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 4/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 4/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 4/29/2025 <0.002 µg/L 0.002 µg/L Not 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 Barona.

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 090600119 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

09 Drinking Water Authority

09's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find 09 regulator via EPA SDWIS

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
2024 Revised Total Coliform Rule RPT 1 SDWIS / 090600119 / 8000
2022 Total Haloacetic Acids (HAA5) MR 1 SDWIS / 090600119 / 2456
2022 Revised Total Coliform Rule MON 1 SDWIS / 090600119 / 8000
2018 TTHM MCL 1 SDWIS / 090600119 / 2950
2008 Combined Uranium MCL 8 SDWIS / 090600119 / 4006
2005 Consumer Confidence Rule Other 3 SDWIS / 090600119 / 7000
2004 Coliform (TCR) MCL 6 SDWIS / 090600119 / 3100
2002 Coliform (TCR) MR 17 SDWIS / 090600119 / 3100
2002 Gross Alpha, Excl. Radon and U MCL 3 SDWIS / 090600119 / 4000
1998 Endrin MR 2 SDWIS / 090600119 / 2005
1998 Toxaphene MR 2 SDWIS / 090600119 / 2020
1998 Methoxychlor MR 2 SDWIS / 090600119 / 2015
1998 LASSO MR 2 SDWIS / 090600119 / 2051
1998 Heptachlor MR 2 SDWIS / 090600119 / 2065
1998 Heptachlor epoxide MR 2 SDWIS / 090600119 / 2067

How Barona Compares

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

Metric Barona 09 avg Federal benchmark
Total violations 114 149.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 18 10.4 Indicates a contaminant exceeded a federal MCL
PFAS detection 2 compounds 73.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 6,000 1,720 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 323 regulated public water systems in 09.

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 Barona water safe to drink? ▼
Barona (PWS ID: 090600119) has 114 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 2 PFAS compounds found. This system serves 6,000 people using Groundwater sources.
How many people does Barona serve? ▼
Barona serves 6,000 people in Lakeside, 09. It is a Native American-owned system using Groundwater water sources with 1 service connections.
What type of violations does Barona have? ▼
Barona has 114 total violations: 18 health-based violations (MCL exceedances or treatment failures), 69 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Barona water? ▼
Yes. UCMR5 testing detected 2 PFAS compounds in Barona's water supply: PFPeA, lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Barona use? ▼
Barona uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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