PWSID CA1400037
LONE PINE OASIS
Transient non-community based in Valley Center, CA
Service area on file with EPA: Inyo County. EPA's recorded service area can be incomplete for regional authorities. The cities and counties above are what the utility has filed with EPA; the utility may serve additional areas.
- Population served
- 49
- Source
- Groundwater
- Status
- Active
At a glance
Recent tests are below federal safety limits
-
CDC's My Water's Fluoride listing reports this system adjusts fluoride to the recommended level, or buys water from a system that does.
Per CDC My Water's Fluoride · See details below
Past 5 years: 2 health-based violations on file, all marked Resolved or Archived. See compliance history below.
Risk classification follows EPA's published values for safe drinking water, with caution and concern bands reviewed by a clinician. Past resolved violations do not influence this card. See methodology.
Lead service line inventory
No inventory data on file
We do not yet have this utility's published Lead Service Line Inventory on file. The EPA Lead and Copper Rule Improvements (LCRI) required every community water system to publish one by October 16, 2024 and to identify and replace any lead lines within 10 years. How lead enters drinking water.
Phase 1 coverage focuses on the largest NC utilities. Smaller systems will be added; in the meantime, ask your utility for their inventory or check their Consumer Confidence Report.
Lead and copper test results
The most recent measurement per contaminant from EPA's Lead and Copper Rule sampling.
Why only lead and copper, and not arsenic, nitrate, or others?
EPA's bulk SDWIS download is the only nationwide per-system sample data they publish, and it only includes the Lead and Copper Rule table. Values for other regulated contaminants (TTHMs, nitrate, arsenic, etc.) appear on this page only when they trigger a violation. For the full per-system contaminant suite, see the utility's annual Consumer Confidence Report (link further down the page).
| Contaminant | Most recent | Date | Risk |
|---|---|---|---|
| PB90 | 0 mg/L | December 31, 2026 | Below regulatory thresholds |
Data from EPA SDWIS (Lead and Copper Rule sample table) , last refreshed May 24, 2026.
Fluoride
Per CDC My Water's Fluoride
LONE PINE OASIS adds fluoride to its drinking water.
CDC classifies a system as fluoridated when it adjusts fluoride to the recommended level, or when it buys water from a system that does. The U.S. Public Health Service recommends 0.7 mg/L for community water fluoridation.
Source: CDC My Water's Fluoride, listed under Foothill Lone Pine Mobile Home Park, Llc (Inyo County). Verify on CDC's site .
Area context
Inyo County, CA (2020 data)
- Community water systems
- 10 of 31 add fluoride
- Population on fluoridated water
- 910 of 55,778 (1.6%)
California statewide (2020 data)
- Population on fluoridated water
- 21,879,582 of 38,051,212 (57.5%)
- Community water systems adding fluoride
- 417 of 3,057
Data from CDC My Water's Fluoride (per-system status) , last refreshed May 19, 2026.
Data from CDC Water Fluoridation Reporting System (state and county aggregates) , last refreshed May 16, 2026.
Recorded contaminant measurements (from violations)
When this system exceeded a regulatory limit and EPA recorded the measured value, that value is shown here. These are not routine sample results: they are the values the violation was triggered on.
| Period | Contaminant | Measured | Federal MCL | Status |
|---|---|---|---|---|
| October 1, 2022 | Arsenic | 10.8UG/L | 0.01 UG/L | Health-based |
| October 1, 2022 | Arsenic | 10.8UG/L | 0.01 UG/L | Health-based |
Data from EPA SDWIS (violation records) , last refreshed May 24, 2026.
Compliance history
EPA-recorded violations against this system over the last 5 years.
How to read this section
Health-based violations are when a measured limit was exceeded; the measured concentration is shown alongside the EPA federal limit where SDWIS published it. Monitoring and reporting items are paperwork issues (missed sample dates, late filings) that do not themselves indicate unsafe water.
2 resolved health-based violations in the last 5 years
All 2 health-based violations in the last 5 years are marked Resolved or Archived. Past violations do not represent current water quality.
| Period start | Contaminant | What happened | Measured level | Status |
|---|---|---|---|---|
| October 1, 2022 | Arsenic | Maximum Contaminant Level Violation, Average | 10.80 UG/L
MCL 0.010 UG/L | Resolved |
| October 1, 2022 | Arsenic | Maximum Contaminant Level Violation, Average | 10.80 UG/L
MCL 0.010 UG/L | Resolved |
44 older violation s (5-10 years ago) · 38 health-based, 6 paperwork , all resolved
| Period start | Relates to | Item | Measured level | Status |
|---|---|---|---|---|
| April 1, 2020 | Combined Uranium | Maximum Contaminant Level Violation, Average | 23 PCI/L
MCL 30 PCI/L | Resolved |
| April 1, 2020 | Combined Uranium | Maximum Contaminant Level Violation, Average | 23 PCI/L
MCL 30 PCI/L | Resolved |
| January 1, 2020 | Combined Uranium | Maximum Contaminant Level Violation, Average | 24 PCI/L
MCL 30 PCI/L | Resolved |
| January 1, 2020 | Combined Uranium | Maximum Contaminant Level Violation, Average | 24 PCI/L
MCL 30 PCI/L | Resolved |
| January 1, 2020 | Combined Uranium | Maximum Contaminant Level Violation, Average | 24 PCI/L
MCL 30 PCI/L | Resolved |
| October 1, 2019 | Combined Uranium | Maximum Contaminant Level Violation, Average | 26 PCI/L
MCL 30 PCI/L | Resolved |
| October 1, 2019 | Combined Uranium | Maximum Contaminant Level Violation, Average | 26 PCI/L
MCL 30 PCI/L | Resolved |
| October 1, 2019 | Combined Uranium | Maximum Contaminant Level Violation, Average | 26 PCI/L
MCL 30 PCI/L | Resolved |
| October 1, 2019 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | — | Resolved |
| October 1, 2019 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | — | Resolved |
| July 1, 2019 | Combined Uranium | Maximum Contaminant Level Violation, Average | 22 PCI/L
MCL 30 PCI/L | Resolved |
| July 1, 2019 | Combined Uranium | Maximum Contaminant Level Violation, Average | 22 PCI/L
MCL 30 PCI/L | Resolved |
| July 1, 2018 | Arsenic | Maximum Contaminant Level Violation, Average | 0.025 MG/L
MCL 0.010 MG/L | Resolved |
| July 1, 2018 | Arsenic | Maximum Contaminant Level Violation, Average | 0.025 MG/L
MCL 0.010 MG/L | Resolved |
| April 1, 2018 | Arsenic | Maximum Contaminant Level Violation, Average | 0.040 MG/L
MCL 0.010 MG/L | Resolved |
| April 1, 2018 | Arsenic | Maximum Contaminant Level Violation, Average | 0.040 MG/L
MCL 0.010 MG/L | Resolved |
| January 1, 2018 | Arsenic | Maximum Contaminant Level Violation, Average | 0.048 MG/L
MCL 0.010 MG/L | Resolved |
| January 1, 2018 | Arsenic | Maximum Contaminant Level Violation, Average | 0.048 MG/L
MCL 0.010 MG/L | Resolved |
| January 1, 2018 | Combined Uranium | Maximum Contaminant Level Violation, Average | 25 PCI/L
MCL 30 PCI/L | Resolved |
| January 1, 2018 | Combined Uranium | Maximum Contaminant Level Violation, Average | 25 PCI/L
MCL 30 PCI/L | Resolved |
| October 1, 2017 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | — | Resolved |
| October 1, 2017 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | — | Resolved |
| October 1, 2017 | Combined Uranium | Maximum Contaminant Level Violation, Average | 24 PCI/L
MCL 30 PCI/L | Resolved |
| October 1, 2017 | Combined Uranium | Maximum Contaminant Level Violation, Average | 24 PCI/L
MCL 30 PCI/L | Resolved |
| October 1, 2017 | Arsenic | Maximum Contaminant Level Violation, Average | 0.052 MG/L
MCL 0.010 MG/L | Resolved |
| October 1, 2017 | Arsenic | Maximum Contaminant Level Violation, Average | 0.052 MG/L
MCL 0.010 MG/L | Resolved |
| July 1, 2017 | Arsenic | Maximum Contaminant Level Violation, Average | 0.049 MG/L
MCL 0.010 MG/L | Resolved |
| July 1, 2017 | Arsenic | Maximum Contaminant Level Violation, Average | 0.049 MG/L
MCL 0.010 MG/L | Resolved |
| July 1, 2017 | Combined Uranium | Maximum Contaminant Level Violation, Average | 25 PCI/L
MCL 30 PCI/L | Resolved |
| July 1, 2017 | Combined Uranium | Maximum Contaminant Level Violation, Average | 25 PCI/L
MCL 30 PCI/L | Resolved |
| April 1, 2017 | Combined Uranium | Maximum Contaminant Level Violation, Average | 25 PCI/L
MCL 30 PCI/L | Resolved |
| April 1, 2017 | Combined Uranium | Maximum Contaminant Level Violation, Average | 25 PCI/L
MCL 30 PCI/L | Resolved |
| April 1, 2017 | Arsenic | Maximum Contaminant Level Violation, Average | 0.044 MG/L
MCL 0.010 MG/L | Resolved |
| April 1, 2017 | Arsenic | Maximum Contaminant Level Violation, Average | 0.044 MG/L
MCL 0.010 MG/L | Resolved |
| January 1, 2017 | Combined Uranium | Maximum Contaminant Level Violation, Average | 21 PCI/L
MCL 30 PCI/L | Resolved |
| January 1, 2017 | Combined Uranium | Maximum Contaminant Level Violation, Average | 21 PCI/L
MCL 30 PCI/L | Resolved |
| January 1, 2017 | Arsenic | Maximum Contaminant Level Violation, Average | 0.036 MG/L
MCL 0.010 MG/L | Resolved |
| January 1, 2017 | Arsenic | Maximum Contaminant Level Violation, Average | 0.036 MG/L
MCL 0.010 MG/L | Resolved |
| January 1, 2017 | Arsenic | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Arsenic | Monitoring, Regular | — | Resolved |
| October 1, 2016 | Arsenic | Maximum Contaminant Level Violation, Average | 0.027 MG/L
MCL 0.010 MG/L | Resolved |
| October 1, 2016 | Arsenic | Maximum Contaminant Level Violation, Average | 0.027 MG/L
MCL 0.010 MG/L | Resolved |
| July 1, 2016 | Arsenic | Maximum Contaminant Level Violation, Average | 0.019 MG/L
MCL 0.010 MG/L | Resolved |
| July 1, 2016 | Arsenic | Maximum Contaminant Level Violation, Average | 0.019 MG/L
MCL 0.010 MG/L | Resolved |
Data from EPA SDWIS (violation records) , last refreshed May 24, 2026.
Where to see every contaminant this utility tested for
EPA's bulk SDWIS dataset gives MyTapWater.us per-system measured values for lead and copper, plus violation records for everything else. To see every regulated contaminant this utility tested for in the past year (TTHMs, HAA5, nitrate, arsenic, fluoride, chromium, etc.) with measured values, read the utility's Consumer Confidence Report (CCR).
Every community water system is required by EPA to publish a CCR annually, by July 1, listing every contaminant they sampled, the measured value, the federal limit, and any health-based exceedances. Most utilities post the report online; some mail it with your bill.
How to find LONE PINE OASIS's CCR:
- Search the web for "LONE PINE OASIS consumer confidence report" . The PDF is usually on the utility's own website.
- Or call the utility directly. Their phone number is in the contact section below.
Other water systems in Inyo County, CA
Compare nearby utilities by population served.
- BISHOP CREEK CHEVRON
17k served · BISHOP
- BISHOP, CITY OF
3,819 served · BISHOP
- PETITE PANTRY
3,012 served · Inyo County
- LEE'S FRONTIER
2,000 served · Inyo County
- INYO COUNTY PWD - LONE PINE
1,835 served · Inyo County
Contact this utility
Public administrative contact information for this water system, as filed with the EPA. Use this to ask about your service line, request your home's lead status, or report a water quality issue.
- Administrator
- MCCORMICK, KEVIN
- Phone
- 760-876-4120
- kevin@lpmhrv.com
- Mailing address
- P.O. Box 1241VALLEY CENTER, CA 92082
Where this page's data comes from
Bundle released 2026-Q2, regenerated May 24, 2026. Each section above also shows its own source date so you can tell at a glance how fresh that part of the page is.
- EPA SDWIS bulk download — last refreshed May 24, 2026 (system info, violations, lead and copper samples).
- CDC My Water's Fluoride — last refreshed May 19, 2026 (per-system Yes/No fluoridation status).
- CDC Water Fluoridation Reporting System — last refreshed May 16, 2026 (state and county fluoridation aggregates).
Every value on this page is cross-verified before publication; read our methodology for the verification steps and corrections process.