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States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 090600138

Lone Pine

Lone Pine, EPA Region 9 — Tribal Water Systems 93545 - drinking water served from groundwater sources to 535 people, tracked in EPA SDWIS and UCMR5.

535
People served
131
EPA violations
6
Health-based
Untested
UCMR5 result

The verdict

EPA records 131 drinking-water violations at Lone Pine, 5% of them health-based.

131
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
535
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lone Pine

Lone Pine is a native american-owned community water system that delivers drinking water to 535 residents in Lone Pine, EPA Region 9 — Tribal Water Systems through 115 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 131 total violations for this system , of which 6 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 71 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 23 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 9 — Tribal Water Systems has thousands of regulated public water systems tracked by EPA under the Safe Drinking Water Act.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
535
Total Violations
131
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
115
School/Daycare
No
MCL Violations
6
Monitoring Violations
71
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 23 2015
Consumer Confidence Rule Other 9 2014
Nitrate MR 6 2018
Coliform (TCR) MCL 6 2002
TTHM MR 4 2017
Total Haloacetic Acids (HAA5) MR 4 2017
Barium MR 1 2011
Cadmium MR 1 2011
Chromium MR 1 2011
CYANIDE MR 1 2011
Fluoride MR 1 2011
Mercury MR 1 2011
Selenium MR 1 2011
Antimony, Total MR 1 2011
Beryllium, Total MR 1 2011
1,2,4-Trichlorobenzene MR 1 2014
cis-1,2-Dichloroethylene MR 1 2014
o-Dichlorobenzene MR 1 2014
p-Dichlorobenzene MR 1 2014
Vinyl chloride MR 1 2014
1,1-Dichloroethylene MR 1 2014
1,2-Dichloroethane MR 1 2014
1,1,1-Trichloroethane MR 1 2014
1,2-Dichloropropane MR 1 2014
Styrene MR 1 2014
Ethylbenzene MR 1 2014
Benzene MR 1 2014
Asbestos MR 1 1996
Trichloroethylene MR 1 2014
CHLOROBENZENE MR 1 2014

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 Lone Pine.

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 090600138 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 9 — Tribal Water Systems Drinking Water Authority

EPA Region 9 — Tribal Water Systems'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
2018 Nitrate MR 6 SDWIS / 090600138 / 1040
2017 TTHM MR 4 SDWIS / 090600138 / 2950
2017 Total Haloacetic Acids (HAA5) MR 4 SDWIS / 090600138 / 2456
2015 Coliform (TCR) MR 23 SDWIS / 090600138 / 3100
2014 Consumer Confidence Rule Other 9 SDWIS / 090600138 / 7000
2014 1,2,4-Trichlorobenzene MR 1 SDWIS / 090600138 / 2378
2014 cis-1,2-Dichloroethylene MR 1 SDWIS / 090600138 / 2380
2014 o-Dichlorobenzene MR 1 SDWIS / 090600138 / 2968
2014 p-Dichlorobenzene MR 1 SDWIS / 090600138 / 2969
2014 Vinyl chloride MR 1 SDWIS / 090600138 / 2976
2014 1,1-Dichloroethylene MR 1 SDWIS / 090600138 / 2977
2014 1,2-Dichloroethane MR 1 SDWIS / 090600138 / 2980
2014 1,1,1-Trichloroethane MR 1 SDWIS / 090600138 / 2981
2014 1,2-Dichloropropane MR 1 SDWIS / 090600138 / 2983
2014 Styrene MR 1 SDWIS / 090600138 / 2996

How Lone Pine Compares

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

Metric Lone Pine EPA Region 9 — Tribal Water Systems avg Federal benchmark
Total violations 131 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 6 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 535 - Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across all regulated public water systems in EPA Region 9 — Tribal Water Systems.

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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Lone Pine water safe to drink? ▼
Lone Pine (PWS ID: 090600138) has 131 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 535 people using Groundwater sources.
How many people does Lone Pine serve? ▼
Lone Pine serves 535 people in Lone Pine, EPA Region 9 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 115 service connections.
What type of violations does Lone Pine have? ▼
Lone Pine has 131 total violations: 6 health-based violations (MCL exceedances or treatment failures), 71 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lone Pine water? ▼
No PFAS testing data is available for Lone Pine under the EPA's UCMR5 monitoring program.
What water source does Lone Pine use? ▼
Lone Pine 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.