Pipes Canyon Fault Valley Basin
DWR basin 7-49 · 3,408 acres. DWR describes recharge as chiefly the infiltration of runoff through alluvial deposits at the base of the surrounding mountains.
Water · Living Record
Water at
Boulder Gardens
Where our water comes from, where it goes, and what the desert geology may be telling us. A dried spring and a weekly water run have opened a much larger groundwater investigation.
6–12 galtypical drinking-water collection
≈ 1 weekhow long a collection usually lasts
25,500 acresPioneertown Mountains Preserve
10 µg/LCalifornia arsenic drinking-water MCL
Field Report 006 · Water
Spring Water Harvest
The weekly water-run story now lives where it belongs: in Field Report 006. It records the dried spring at Boulder Gardens, the preserve drinking-water outlet, the collection routine, the photographs, and the location map.
This Water record begins where the Field Report leaves off: What groundwater basin lies beneath each place? How does mountain-front recharge move through this landscape? And do the historic arsenic problems in Pioneertown-area public wells tell us anything about the water we actually use?
Read Field Report 006 →
Reading the Landscape
Pipes Canyon is a water place
The surrounding desert can look dry on the surface while water is moving below it. The Preserve reports year-round riparian corridors in Pipes Canyon and a year-round stream within the Pipes Canyon Wilderness.
Year-round riparian corridor
The Wildlands Conservancy describes year-round riparian corridors in Pipes Canyon and Little Morongo Canyon. In a desert landscape, that vegetation is a visible clue to dependable water at or near the surface.
Still unknown
The preserve lists drinking water as an amenity, but the public page does not identify whether this specific outlet is gravity-fed, pumped, spring-fed, or supplied from a developed seep.
Follow the larger watershed:
Pipes Creek, the Burns Spring drainage, and Antelope Creek all become part of the
Pipes Wash system as water moves from the mountains toward Ames Valley.
Open Where the Water Comes From →
Groundwater Beneath Home
Ames Valley, Rimrock & our deep well
The well near Rimrock raises a different question from the preserve outlet. Current state mapping places a large groundwater basin immediately east of the San Bernardino Mountains, but the exact aquifer tapped by a private well cannot be assigned from a town name alone.
Ames Valley Groundwater Basin
DWR basin 7-16 · 110,000 acres / 169.7 square miles. It underlies Ames Valley, Homestead Valley, and Pipes Wash.
Mountain recharge
DWR identifies natural recharge mainly as percolation of streamflow from the San Bernardino Mountains and precipitation on the valley floor. Groundwater generally moves eastward and northeastward.
Deep does not automatically mean clean
DWR reports wells in the Ames Valley basin reaching as deep as 838 feet without encountering bedrock. Water chemistry can change with depth, geology, faults, and where water enters a well.
Why the names get confusing:
a 1972 USGS report used an older scheme in which a “Means Valley basin” was divided into
Pioneertown, Pipes, and Reche subbasins. Current DWR Bulletin 118 mapping uses different recognized
basin boundaries and names, including Ames Valley (7-16) and Pipes Canyon Fault Valley (7-49).
For the Boulder Gardens well, the next useful evidence is the actual GPS location and well-completion record.
Water Quality
The arsenic question
Pioneertown's documented groundwater problems are important context, but they are not proof that the preserve outlet—or every nearby private well—has the same chemistry.
A real local history
California Drinking Water Watch records a 2012 arsenic violation for the Pioneertown public water system with an analysis result of 111 µg/L. San Bernardino County later reported 62 µg/L in March 2017. California's current arsenic maximum contaminant level is 10 µg/L.
County planning documents also identified fluoride and radiological constituents as concerns in the old Pioneertown groundwater supply. As of July 27, 2019, the community began receiving clean drinking water through a four-mile interconnection with Hi-Desert Water District after previously relying on groundwater wells with arsenic, uranium, and fluoride problems.
Important: these numbers are from the Pioneertown community water system.
They are not test results from the preserve outlet in the photographs, and they are
not test results from the Boulder Gardens well. Clear, pleasant-tasting water can still contain arsenic.
Boulder Gardens Water Systems
Four parts of one living record
The Water page can grow as each source, storage system, and measurement becomes better documented.
💧
Seasonal spring
Former local drinking-water source at Boulder Gardens. It has now dried up, making the change itself an important long-term observation.
Current status · dry◉
Deep well near Rimrock
Existing well near the mountain-front edge of the community. Exact depth, coordinates, completion details, and untreated-water chemistry should be added to the living record.
Priority · characterize & test▱
Drinking-water runs
The current drinking-water routine is documented in FR006. The Field Report keeps the complete map and photographic record; this page follows the larger hydrology and water-quality questions.
See FR006 · active source▣
Tank & monitoring
Recorded tank geometry includes a roughly 91–92 inch diameter and about 65 inches of water depth from outlet to full level. Sensor monitoring is part of the Fieldstation water record.
Measured infrastructureOne water run
became a question.
The question became
a map of the land.
Next Fieldstation Investigation
Turn the questions into measurements
Locate the well preciselyRecord GPS coordinates and find the well-completion report if available.
Sample untreated well waterCollect before any household filtration or treatment.
Sample the preserve outletIdeally collect during the same period so the two sources can be compared.
Use a certified laboratoryPriority panel: arsenic, fluoride, uranium, gross alpha, nitrate, TDS, and basic field chemistry such as pH.
Publish the results with contextRecord date, laboratory, method/detection limit, source location, and whether the result is raw or treated water.
Sources & Record Notes
What this page is based on
Public sources establish the regional context. Fieldstation observations and photographs establish what we actually see and use.
The Wildlands ConservancyPioneertown Mountains Preserve · 25,500 acres, year-round riparian corridors, visitor amenities including drinking water.
California DWR Bulletin 118Ames Valley Groundwater Basin 7-16 · basin boundaries, recharge, groundwater movement, well depths, and water-quality context.
California DWR Bulletin 118Pipes Canyon Fault Valley Groundwater Basin 7-49 · 3,408 acres and mountain-runoff recharge.
U.S. Geological Survey · 1972Ground-Water Resources of the Yucca Valley–Joshua Tree Area · older Pioneertown/Pipes subbasin terminology.
California Drinking Water WatchCSA 70 W-4 Pioneertown · 2012 arsenic MCL violation, analysis result 111 µg/L.
San Bernardino CountyWater, Wastewater & Hydrology Existing Conditions · March 2017 arsenic result of 62 µg/L and related water-quality concerns.
California State Water Resources Control Board · 2019Pioneertown began receiving clean drinking water July 27, 2019 through a four-mile Hi-Desert Water District interconnection; the prior wells exceeded safe levels of arsenic, uranium, and fluoride.
Field Reports
Observations connected to Water
Land & Ecology + Water · Boulder Gardens Sanctuary
Our Second Big Rain
About 2 inches of rain fell during roughly 8–10 hours of sustained rainfall, making this an important event in both the weather and water record.
Read the full observation →
Land & Ecology · Boulder Gardens Sanctuary
First real rain of the season!
Tropical Rain Reaches Boulder Gardens September 6–7, 2026 An unusually strong early-September rain event for the Mojave Desert, delivering roughly half an inch of rain — more than the area typically receives during the entire month of September.
Read the full observation →
Water · Village Water Tank
Water Wasted
Continuous tank-level observations beginning in mid-August provided the first useful picture of everyday water consumption at Boulder Gardens.
Read the full observation →Water · Local, Off Site
Spring Water Harvest
Since our own spring at Boulder Gardens dried up, we have been making regular water runs once a week to Pioneertown Mountains Preserve, a Wildlands Conservancy preserve in the mountains above Pioneertown. We fill up about 6 to 12 gallons at a time
Read the full observation →