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KATHERINE RESORTS WATER COMPANY

PWS ID: AZ0408018 · LA JOLLA, Arizona 92037

KATHERINE RESORTS WATER COMPANY serves 58 people in LA JOLLA, Arizona using Groundwater water sources. It has 296 recorded EPA violations, including 7 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: KATHERINE RESORTS WATER COMPANY

KATHERINE RESORTS WATER COMPANY is a private-owned community water system that delivers drinking water to 58 residents in LA JOLLA, Arizona (Mohave County) through 44 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 296 total violations for this system , of which 7 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 211 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 Chlorine, recorded in 86 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 210 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Arizona, EPA tracks 1,493 public water systems serving 7,322,166 people, with 228,944 cumulative violations and 15,663 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 153.3 violations. KATHERINE RESORTS WATER COMPANY's 296 violations sit above the Arizona average. Statewide, 145 of 152 UCMR5-tested systems have reported PFAS detections (95.4%). 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
58
Total Violations
296
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
44
County
Mohave
School/Daycare
No
MCL Violations
1
Monitoring Violations
211
Treatment Tech Violations
6

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 86 2025
Consumer Confidence Rule Other 47 2020
Total Haloacetic Acids (HAA5) MR 25 2025
TTHM MR 24 2025
Di(2-ethylhexyl) phthalate MR 9 2020
Lead and Copper Rule MR 9 2025
Coliform (TCR) MR 6 2014
Public Notice Other 6 2024
Groundwater Rule TT 6 2023
Di(2-ethylhexyl) adipate MR 3 2022
Hexachlorocyclopentadiene MR 3 2022
Atrazine MR 3 2022
Simazine MR 3 2022
Benzo(a)pyrene MR 3 2022
HEXACHLOROBENZENE MR 3 2022
Nitrate MR 2 1998
Revised Total Coliform Rule MON 2 2016
Gross Alpha, Excl. Radon and U MR 2 1988
Revised Total Coliform Rule RPT 2 2023
Carbofuran MR 1 1998
2,4-D MR 1 1998
2,4,5-TP MR 1 1998
Pentachlorophenol MR 1 1998
Chlordane MR 1 1998
BHC-GAMMA MR 1 1998
Methoxychlor MR 1 1998
Diquat MR 1 1998
Endothall MR 1 1998
Fluoride MR 1 1979
Cadmium MR 1 1979

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
PFMPA 4/4/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeS 4/4/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 4/4/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFOS 4/4/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 4/4/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 4/4/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 4/4/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 4/4/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 4/4/2023 <0.008 µg/L 0.008 µg/L Not Detected
lithium 4/4/2023 210.0000 µg/L 9 µg/L Detected
PFDA 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 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
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
PFBA 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
PFOA 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
PFDoA 4/4/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 11/2/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 11/2/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 11/2/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 11/2/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFHxA 10/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 10/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 10/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 10/3/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 10/3/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 10/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 10/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 10/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 10/3/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 10/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 10/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 10/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 10/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 10/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 10/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 10/3/2023 <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 KATHERINE RESORTS WATER COMPANY.

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 AZ0408018 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Arizona Drinking Water Authority

Arizona DEQ — Drinking Water Program is the primacy agency that licenses and inspects KATHERINE RESORTS WATER COMPANY under EPA-delegated authority.

Open AZ regulator portal

Source: Arizona DEQ — Drinking Water Program

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 Chlorine MR 86 SDWIS / AZ0408018 / 0999
2025 Total Haloacetic Acids (HAA5) MR 25 SDWIS / AZ0408018 / 2456
2025 TTHM MR 24 SDWIS / AZ0408018 / 2950
2025 Lead and Copper Rule MR 9 SDWIS / AZ0408018 / 5000
2024 Public Notice Other 6 SDWIS / AZ0408018 / 7500
2023 Groundwater Rule TT 6 SDWIS / AZ0408018 / 0700
2023 Revised Total Coliform Rule RPT 2 SDWIS / AZ0408018 / 8000
2022 Di(2-ethylhexyl) adipate MR 3 SDWIS / AZ0408018 / 2035
2022 Hexachlorocyclopentadiene MR 3 SDWIS / AZ0408018 / 2042
2022 Atrazine MR 3 SDWIS / AZ0408018 / 2050
2022 Simazine MR 3 SDWIS / AZ0408018 / 2037
2022 Benzo(a)pyrene MR 3 SDWIS / AZ0408018 / 2306
2022 HEXACHLOROBENZENE MR 3 SDWIS / AZ0408018 / 2274
2020 Consumer Confidence Rule Other 47 SDWIS / AZ0408018 / 7000
2020 Di(2-ethylhexyl) phthalate MR 9 SDWIS / AZ0408018 / 2039

How KATHERINE RESORTS WATER COMPANY Compares

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

Metric KATHERINE RESORTS WATER COMPANY Arizona avg Federal benchmark
Total violations 296 153.3 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 7 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 95.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 58 4,904 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,493 regulated public water systems in Arizona.

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 KATHERINE RESORTS WATER COMPANY water safe to drink? ▼
KATHERINE RESORTS WATER COMPANY (PWS ID: AZ0408018) has 296 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 58 people using Groundwater sources.
How many people does KATHERINE RESORTS WATER COMPANY serve? ▼
KATHERINE RESORTS WATER COMPANY serves 58 people in LA JOLLA, Arizona. It is a Private-owned system using Groundwater water sources with 44 service connections.
What type of violations does KATHERINE RESORTS WATER COMPANY have? ▼
KATHERINE RESORTS WATER COMPANY has 296 total violations: 7 health-based violations (MCL exceedances or treatment failures), 211 monitoring/reporting violations, and 6 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in KATHERINE RESORTS WATER COMPANY water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in KATHERINE RESORTS WATER COMPANY's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does KATHERINE RESORTS WATER COMPANY use? ▼
KATHERINE RESORTS WATER COMPANY 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