California Collocated Communities Webpage

California Collocated Resources


The new California low-temperature database lists 989 thermal wells and springs, a 56% increase over entries reported in 1980. Youngs (1994) estimates that there may be 58 distinct low-temperature resource areas, and an additional 194 "singular" thermal occurrences. These resources occur in volcanic terranes in northern California, in the Basin and Range Province in the northeastern part of the state, within the Long Valley caldera, and along faults in the sedimentary basins in southern California. Youngs (1994) has identified 56 communities that are located within 8 km of a geothermal resource that has a reported temperature greater than 50°C. The total population collocated with these resources exceeds 2 million people, thus the potential for expanded direct use in the near term is great. Young (1994) recommended seven areas for comprehensive resource studies and a technical study for one area.

Young, L. G., 1994. California Low-Temperature Geothermal Resources Update - 1993, California Department of Conservation, Division of Mines and Geology, Technical Report to Oregon Institute of Technology, Geo-Heat Center, 25 p.

For further information on California Geothermal Energy
Working Group, Contact

Elaine Sison-Lebrilla
Geothermal Program Manager
California Energy Commission
Tel: (916) 653-0363
Email: esisonle@energy.state.ca.us

Alpine County
Markleeville
Colusa County
Wilbur Springs
Contra Costa County
Bryon
Imperial County
Bombay Beach, Brawley, Calexico, Calipatria, El Centro, Glamis, Heber, Holtville, Niland, Salton City, and Westmorland
Inyo County
Bishop, and Coso Junction
Kern County
Johannesburg, Lake Isabella, Miracle Hot Springs, and Randsburg
Lake County
Clear Lake, Kelseyville, Lower Lake, and Middletown / Cobb,
Lassen County
Bieber, Litchfield, Susanville, and Wendel
Los Angeles County
Los Angeles / Encino
Modoc County
Alturas, Canby, Cedarville, Day, Eagleville, Fort Bidwell, Lake City, and Likely
Mono County
Benton, Bridgeport, Lee Vining, and Mammoth Lakes
Monterey County
Tassajara Hot Springs
Napa County
Calistoga
Orange County
Costa Mesa, Huntington Beach, Newport Beach, and Yorba Linda
Placer County
Kings Beach
Plumas County
Drakesbad
Riverside County
Desert Hot Springs, Hemet, Lake Elsinore, Temecula, Widomar, and Winchester
San Bernardino County
Colton, Highlands, Red Mountain, San Bernardino, Trona, and Twentynine Palms
San Diego County
San Diego, and Warner Springs
San Luis Obispo County
San Luis Obispo
Santa Barbara County
Gaviota, and Montecito
Shasta County
Big Bend
Sierra County
Loyalton
Sonoma County
Boyes Hot Springs / Sonoma
Ventura County
Ojai / Meiners Oaks
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Alpine County

Markleeville

Latitude: 38.7000
Longitude: 119.7833
Population: 100
Resource Temperature: 65°C (149°F)
Number of Wells: 2
Typical Depth: N/A
Flow: 873 L/min (230 gpm)
TDS: 1720 mg/L
Current Use: Baths/pools and heat exchanger
HDD: 7884°F
Design Temperature: 8°F
Remarks: No. 3 and 4. 2 springs. Located within 3 miles of Markleeville.
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Colusa County

Wilbur Springs

Latitude: 39.0333
Longitude: 122.4301
Population: 10
Resource Temperature: 175°C (347°F)
Number of Wells: 5
Typical Depth: 2711.6 m (8898 ft)
Flow: 330 L/min (87 gpm)
TDS: 25900 mg/L
Current Use: Direct use in baths/pools
HDD: 2166°F
Design Temperature: 30°F
Remarks: 3 springs and 2 wells. Located within 3 miles of Wilbur Springs.
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Contra Costa County

Byron

Latitude: 37.8472
Longitude: 121.6305
Population: 1100
Resource Temperature: 51°C (123.8°F)
Number of Wells: 1
Typical Depth: 75 m (246.1 ft)
Flow: 600 L/min (159 gpm)
TDS: N/A
Current Use: N/A
HDD: 2806°F
Design Temperature: 30°F
Remarks: 1 well. Located within 1 mile of Bryon.
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Imperial County

Bombay Beach

Latitude: 33.3500
Longitude: 115.7167
Population: 500
Resource Temperature: 88°C (190.4°F)
Number of Wells: 11
Typical Depth: 201 m (659.4 ft)
Flow: 2660 L/min (703 gpm)
TDS: 3800 mg/L
Current Use: Aquaculture
HDD: 925°F
Design Temperature: 38°F
Remarks: 11 wells. Located within 5 miles of Bombay Beach.

Brawley

Latitude: 32.9833
Longitude: 115.5333
Population: 19450
Resource Temperature: 138°C (280.4°F)
Number of Wells: 5
Typical Depth: 2545 m (8350 ft)
Flow: 500 L/min (132 gpm)
TDS: 28000 mg/L
Current Use: N/A
HDD: 925°F
Design Temperature: 38°F
Remarks: 5 wells. Located within 2 miles of Brawley.

Calexico

Latitude: 32.6667
Longitude: 115.5000
Population: 19200
Resource Temperature: 168°C (334.4°F)
Number of Wells: 2
Typical Depth: 1531 m (5023 ft)
Flow: 8500 L/min (2245 gpm)
TDS: 20000 mg/L
Current Use: N/A
HDD: 925°F
Design Temperature: 38°F
Remarks: 2 wells. Located within 6 miles of Calexico.

Calipatria

Latitude: 33.1333
Longitude: 115.5167
Population: 2700
Resource Temperature: 360°C (680°F)
Number of Wells: 7
Typical Depth: 1236 m (4055 ft)
Flow: 6900 L/min (1823 gpm)
TDS: 390000 mg/L
Current Use: N/A
HDD: 925°F
Design Temperature: 38°F
Remarks: 7 wells. Located within 4 miles of Calipatria.

El Centro

Latitude: 32.8000
Longitude: 115.5667
Population: 32650
Resource Temperature: 168°C (334.4°F)
Number of Wells: 2
Typical Depth: 1531 m (5023 ft)
Flow: 8500 L/min (2245 gpm)
TDS: 20000 mg/L
Current Use: N/A
HDD: 925°F
Design Temperature: 38°F
Remarks: 2 wells. Located within 6 miles of El Centro.

Glamis

Latitude: 33.0000
Longitude: 115.0833
Population: Rural
Resource Temperature: 71°C (159.8°F)
Number of Wells: 1
Typical Depth: 207 m (679.1 ft)
Flow: N/A
TDS: N/A
Current Use: N/A
HDD: 925°F
Design Temperature: 38°F
Remarks: 1 well. Located within 3 miles of Glamis. Rural community.

Heber

Latitude: 32.7333
Longitude: 115.5333
Population: 2566
Resource Temperature: 168°C (334.4°F)
Number of Wells: 2
Typical Depth: 1531 m (5023 ft)
Flow: 8500 L/min (2245 gpm)
TDS: 20000 mg/L
Current Use: N/A
HDD: 925°F
Design Temperature: 38°F
Remarks: 2 wells. Located within 5 miles of Heber.

Holtville

Latitude: 32.7862
Longitude: 115.2488
Population: 4820
Resource Temperature: 204°C (399.2°F)
Number of Wells: 5
Typical Depth: 1829 m (6000 ft)
Flow: 2400 L/min (634 gpm)
TDS: N/A
Current Use: N/A
HDD: 925°F
Design Temperature: 38°F
Remarks: 5 wells. Located within 5 miles of Holtville.

Niland

Latitude: 33.2333
Longitude: 115.5167
Population: 1183
Resource Temperature: 348°C (658.4°F)
Number of Wells: 5
Typical Depth: 1340 m (4396 ft)
Flow: 18000 L/min (4755 gpm)
TDS: 340000 mg/L
Current Use: N/A
HDD: 925°F
Design Temperature: 38°F
Remarks: 5 wells. Located within 4 miles of Niland.

Salton City

Latitude: 33.2520
Longitude: 116.0108
Population: 1100
Resource Temperature: 59°C (138.2°F)
Number of Wells: 2
Typical Depth: N/A
Flow: N/A
TDS: 2210 mg/L
Current Use: N/A
HDD: 925°F
Design Temperature: 38°F
Remarks: 1 spring. Located within 4 miles of Salton City.

Westmorland

Latitude: 33.0333
Longitude: 115.6176
Population: 1400
Resource Temperature: 56°C (132.8°F)
Number of Wells: 3
Typical Depth: 378 m (1240 ft)
Flow: 160 L/min (42 gpm)
TDS: 3020 mg/L
Current Use: N/A
HDD: 925°F
Design Temperature: 38°F
Remarks: 3 wells. Located within 5 miles of Westmorland.
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Inyo County

Bishop

Latitude: 37.3667
Longitude: 118.4000
Population: 3490
Resource Temperature: 58°C (136.4°F)
Number of Wells: 1
Typical Depth: N/A
Flow: 2000 L/min (528 gpm)
TDS: 510 mg/L
Current Use: N/A
HDD: 4313°F
Design Temperature: 16°F
Remarks: 1 spring. Located within 5 miles of Bishop.

Coso Junction

Latitude: 36.0500
Longitude: 117.9500
Population: 30
Resource Temperature: 97°C (206.6°F)
Number of Wells: 3
Typical Depth: 1980 m (6496 ft)
Flow: 7600 L/min (2008 gpm)
TDS: 4600 mg/L
Current Use: Power plant
HDD: 6800°F
Design Temperature: 10°F
Remarks: 3 springs. Located within 5 miles of Coso Junction.
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Kern County

Johannesburg

Latitude: 35.3667
Longitude: 117.6333
Population: 300
Resource Temperature: 96°C (204.8°F)
Number of Wells: 1
Typical Depth: 236 m (774.3 ft)
Flow: N/A
TDS: N/A
Current Use: Power plant
HDD: 2946°F
Design Temperature: 23°F
Remarks: 1 well. Located within 4 miles of Johanneburg.

Lake Isabella

Latitude: 35.6167
Longitude: 118.4833
Population: 3323
Resource Temperature: 54°C (129.2°F)
Number of Wells: 1
Typical Depth: N/A
Flow: 415 L/min (110 gpm)
TDS: 420 mg/L
Current Use: Direct use in baths/pools and augmenting water supply.
HDD: 2185°F
Design Temperature: 32°F
Remarks: 1 spring. Located within 0.5 miles of Lake Isabella. Proposed area of study.

Miracle Hot Springs

Latitude: 35.5762
Longitude: 118.5330
Population: 40
Resource Temperature: 50°C (122°F)
Number of Wells: 1
Typical Depth: N/A
Flow: 49 L/min (13 gpm)
TDS: N/A
Current Use: Direct use in baths/pools and to augment water supply.
HDD: 2185°F
Design Temperature: 32°F
Remarks: 1 spring. Located within 0.5 miles of Miracle Hot Springs.

Randsburg

Latitude: 35.3667
Longitude: 117.6500
Population: 280
Resource Temperature: 96°C (204.8°F)
Number of Wells: 1
Typical Depth: 236 m (774 ft)
Flow: N/A
TDS: N/A
Current Use: N/A
HDD: 2946°F
Design Temperature: 23°F
Remarks: 1 well. Located within 4.5 miles of Randsburg.
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Lake County

Clear Lake

Latitude: 38.9500
Longitude: 122.6333
Population: 12100
Resource Temperature: 187°C (368.8°F)
Number of Wells: 6
Typical Depth: 2385 m (7824.8 ft)
Flow: 429 L/min (113 gpm)
TDS: 8000 mg/L
Current Use: Greenhouse
HDD: 3065°F
Design Temperature: 29°F
Remarks: 2 springs and 4 wells. Located within 5 miles of Clearlake.

Kelseyville

Latitude: 38.9833
Longitude: 122.8333
Population: 2861
Resource Temperature: 63.9°C (147°F)
Number of Wells: 3
Typical Depth: 180.4 m (590.6 ft)
Flow: 1900 L/min (502 gpm)
TDS: N/A
Current Use: Greenhouse/teaching facility and space heating.
HDD: 3065°F
Design Temperature: 29°F
Remarks: 3 wells. Located within 3 miles of Kerseyville.

Lower Lake

Latitude: 38.9167
Longitude: 122.6000
Population: 1217
Resource Temperature: 187°C (368.6°F)
Number of Wells: 6
Typical Depth: 2385 m (7825 ft)
Flow: 429 L/min (113 gpm)
TDS: 8000 mg/L
Current Use: Greenhouse
HDD: 3065°F
Design Temperature: 29°F
Remarks: 2 springs and 4 wells. Located within 5 miles of Lower Lake.

Middletown / Cobb

Latitude: 38.7500
Longitude: 122.6167
Population: 2000
Resource Temperature: 100°C (212°F)
Number of Wells: 4
Typical Depth: N/A
Flow: 68 L/min (18 gpm)
TDS: 7770 mg/L
Current Use: N/A
HDD: 3716°F
Design Temperature: 22°F
Remarks: 4 springs. Located within 5 miles of Middletown.
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Lassen County

Bieber

Latitude: 41.1167
Longitude: 121.1333
Population: 600
Resource Temperature: 90°C (194°F)
Number of Wells: 2
Typical Depth: 648 m (2126 ft)
Flow: 215 L/min (57 gpm)
TDS: 880 mg/L
Current Use: Direct use in baths/pools and augmenting water supply
HDD: 2688°F
Design Temperature: 29°F
Remarks: 2 springs. Located within 4 miles of Beiber.

Litchfield

Latitude: 40.3833
Longitude: 120.3833
Population: 350
Resource Temperature: 79.4°C (174.9°F)
Number of Wells: 2
Typical Depth: 434 m (1423.9 ft)
Flow: 3956 L/min (1045 gpm)
TDS: N/A
Current Use: District heating system
HDD: 6022°F
Design Temperature: 10°F
Remarks: 2 wells. Located within 2 miles of Litchfield.

Susanville

Latitude: 40.4167
Longitude: 120.6500
Population: 7325
Resource Temperature: 78.9°C (174°F)
Number of Wells: 6
Typical Depth: 283 m (928.5 ft)
Flow: 5144 L/min (1359 gpm)
TDS: 690 mg/L
Current Use: District heating system
HDD: 6248°F
Design Temperature: 4°F
Remarks: 6 wells. Located within 0.5 miles of Susanville.

Wendel

Latitude: 40.3000
Longitude: 120.1947
Population: 100
Resource Temperature: 107°C (224.6°F)
Number of Wells: 4
Typical Depth: 334 m (1095.8 ft)
Flow: 8267 L/min (2184 gpm)
TDS: 1040 mg/L
Current Use: N/A
HDD: 5822°F
Design Temperature: 11°F
Remarks: 2 wells and 2 springs. Located within 3 miles of Wendel.
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Los Angeles County

Los Angeles / Encino

Latitude: 34.1667
Longitude: 118.5250
Population: 3495800
Resource Temperature: 56°C (132.8°F)
Number of Wells: 1
Typical Depth: N/A
Flow: N/A
TDS: 1690 mg/L
Current Use: N/A
HDD: 2929°F
Design Temperature: 22°F
Remarks: 1 well. Located within 1 mile of Los Angeles/Encino.
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Modoc County

Alturas

Latitude: 41.4833
Longitude: 120.5333
Population: 3260
Resource Temperature: 86.1°C (187°F)
Number of Wells: 2
Typical Depth: 896 m (2939.6 ft)
Flow: 303 L/min (80 gpm)
TDS: 1537 mg/L
Current Use: Space heating a local school.
HDD: 6785°F
Design Temperature: -1°F
Remarks: 2 wells. Located 0.5 miles from Alturas. Proposed area of study. Potential applications are expanding space heating to other structures.

Canby

Latitude: 41.4500
Longitude: 120.8667
Population: 450
Resource Temperature: 116°C (240.8°F)
Number of Wells: 2
Typical Depth: 1035 m (3395.7 ft)
Flow: 1250 L/min (330 gpm)
TDS: 900 mg/L
Current Use: N/A
HDD: 6785°F
Design Temperature: -1°F
Remarks: Proposed area of study. 1 well and 1 spring. Located within 0.5 miles of Canby.

Cedarville

Latitude: 41.5333
Longitude: 120.1667
Population: 950
Resource Temperature: 98°C (208.4°F)
Number of Wells: 7
Typical Depth: 194 m (636.5 ft)
Flow: 3225 L/min (852 gpm)
TDS: 1180 mg/L
Current Use: Space heating for 2 schools and a hospital, and baths/pools.
HDD: 6255°F
Design Temperature: 3°F
Remarks: 4 springs and 3 wells. Located within 3 miles of Cedarville.

Day

Latitude: 41.2305
Longitude: 121.4033
Population: 50
Resource Temperature: 73.5°C (164.3°F)
Number of Wells: 1
Typical Depth: N/A
Flow: 300 L/min (79 gpm)
TDS: N/A
Current Use: Irrigation
HDD: 5474°F
Design Temperature: 11°F
Remarks: 1 spring. Located within 1.5 miles of Day.

Eagleville

Latitude: 41.3167
Longitude: 120.1167
Population: 185
Resource Temperature: 56°C (132.8°F)
Number of Wells: 1
Typical Depth: N/A
Flow: 500 L/min (132 gpm)
TDS: 370 mg/L
Current Use: N/A
HDD: 5822°F
Design Temperature: 6°F
Remarks: 1 spring. Located within 3 miles of Eagleville.

Fort Bidwell

Latitude: 41.8500
Longitude: 120.1500
Population: 230
Resource Temperature: 53°C (127.4°F)
Number of Wells: 1
Typical Depth: 24 m (78.7 ft)
Flow: N/A
TDS: 1060 mg/L
Current Use: N/A
HDD: 6365°F
Design Temperature: 9°F
Remarks: 1 well. Locatd within 4 miles of Ft. Bidwell.

Lake City

Latitude: 41.6500
Longitude: 120.2167
Population: 190
Resource Temperature: 160°C (320°F)
Number of Wells: 2
Typical Depth: 1508 m (4948 ft)
Flow: 1370 L/min (362 gpm)
TDS: 1210 mg/L
Current Use: N/A
HDD: 6255°F
Design Temperature: 3°F
Remarks: 1 spring and 1 well. Located within 3 miles of Lake City.

Likely

Latitude: 41.1917
Longitude: 120.3833
Population: 250
Resource Temperature: 77°C (170.6°F)
Number of Wells: 1
Typical Depth: N/A
Flow: 12 L/min (3 gpm)
TDS: 1220 mg/L
Current Use: N/A
HDD: 6255°F
Design Temperature: 3°F
Remarks: 1 spring. Located within 4 miles of Likely.
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Mono County

Benton

Latitude: 37.7963
Longitude: 118.5233
Population: 190
Resource Temperature: 57°C (134.6°F)
Number of Wells: 1
Typical Depth: N/A
Flow: 800 L/min (211 gpm)
TDS: 320 mg/L
Current Use: N/A
HDD: 7900°F
Design Temperature: 8°F
Remarks: 1 spring. Located within 2.5 miles of Benton.

Bridgeport

Latitude: 38.2500
Longitude: 119.2333
Population: 900
Resource Temperature: 82°C (179.6°F)
Number of Wells: 3
Typical Depth: 300 m (984.3 ft)
Flow: 450 L/min (119 gpm)
TDS: 4320 mg/L
Current Use: Power plant
HDD: 6022°F
Design Temperature: 10°F
Remarks: 2 springs and 1 well. Located within 3 miles of Bridgeport.

Lee Vining

Latitude: 37.9667
Longitude: 119.1167
Population: 900
Resource Temperature: 86°C (186.8°F)
Number of Wells: 5
Typical Depth: 1220 m (4002.6 ft)
Flow: 270 L/min (71 gpm)
TDS: 25000 mg/L
Current Use: N/A
HDD: 4313°F
Design Temperature: 11°F
Remarks: 3 wells and 2 springs. Located within 4 miles of Lee Vining.

Mammoth Lakes

Latitude: 37.6500
Longitude: 118.9667
Population: 4900
Resource Temperature: 177°C (350.6°F)
Number of Wells: 9
Typical Depth: 487 m (1597.8 ft)
Flow: 15792 L/min (4172 gpm)
TDS: 1530 mg/L
Current Use: District heating system
HDD: 7900°F
Design Temperature: 8°F
Remarks: 4 wells and 5 springs. Located within 5 miles of Mammoth Lakes.
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Monterey County

Tassajara Hot Springs

Latitude: 36.2337
Longitude: 121.5492
Population: Rural
Resource Temperature: 60°C (140°F)
Number of Wells: 1
Typical Depth: N/A
Flow: 189 L/min (50 gpm)
TDS: N/A
Current Use: Direct use in baths/pools.
HDD: 3556°F
Design Temperature: 38°F
Remarks: 1 spring. Located within 0.5 miles of Tassajara Hot Springs. Summer population of 60.
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Napa County

Calistoga

Latitude: 38.5833
Longitude: 122.5833
Population: 4500
Resource Temperature: 138°C (280.4°F)
Number of Wells: 35
Typical Depth: 244 m (800.5 ft)
Flow: 4447 L/min (1175 gpm)
TDS: 660 mg/L
Current Use: Space heating, baths/pools, bottled water, greenhouse, and augmenting water supply.
HDD: 3065°F
Design Temperature: 29°F
Remarks: 35 wells. Located within 3 miles of Calistoga.
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Orange County

Costa Mesa

Latitude: 33.6333
Longitude: 117.9167
Population: 97400
Resource Temperature: 218°C (424.4°F)
Number of Wells: 1
Typical Depth: 2777 m (9111 ft)
Flow: N/A
TDS: N/A
Current Use: N/A
HDD: 1819°F
Design Temperature: 43°F
Remarks: 1 well. Located within 3 miles of Costa Mesa.

Huntington Beach

Latitude: 33.6667
Longitude: 117.9833
Population: 182800
Resource Temperature: 218°C (424.4°F)
Number of Wells: 1
Typical Depth: 2777 m (9111 ft)
Flow: N/A
TDS: N/A
Current Use: N/A HDD: 1819°F
Design Temperature: 43°F
Remarks: 1 well. Proposed area of study. Great local interest in utilizing the geothermal resource.

Newport Beach

Latitude: 33.6176
Longitude: 117.9333
Population: 67300
Resource Temperature: 218°C (424.4°F)
Number of Wells: 1
Typical Depth: 2777 m (9111 ft)
Flow: N/A
TDS: N/A
Current Use: N/A
HDD: 1819°F
Design Temperature: 43°F
Remarks: 1 well. Located within 3 miles of Newport Beach.

Yorba Linda

Latitude: 33.9025
Longitude: 117.8125
Population: 60700
Resource Temperature: 73°C (163.4°F)
Number of Wells: 1
Typical Depth: N/A
Flow: N/A
TDS: 590 mg/L
Current Use: N/A
HDD: 2166°F
Design Temperature: 30°F
Remarks: 1 well. Located within 1 mile of Yorba Linda.
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Placer County

Kings Beach

Latitude: 39.2333
Longitude: 120.0333
Population: 2796
Resource Temperature: 55°C (131°F)
Number of Wells: 1
Typical Depth: N/A
Flow: 600 L/min (159 gpm)
TDS: 371 mg/L
Current Use: Bathing/pools
HDD: 8290°F
Design Temperature: -1°F
Remarks: 1 spring. Located within 0.5 miles of Kings Beach.
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Plumas County

Drakesbad

Latitude: 40.4208
Longitude: 121.3767
Population: 40
Resource Temperature: 129°C (264.2°F)
Number of Wells: 10
Typical Depth: 387 m (1269.7 ft)
Flow: 897 L/min (237 gpm)
TDS: 4570 mg/L
Current Use: N/A
HDD: 2688°F
Design Temperature: 29°F
Remarks: 9 springs and 1 well. Located within 3 miles of Drakesbad.
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Riverside County

Desert Hot Springs

Latitude: 33.9667
Longitude: 116.5000
Population: 12300
Resource Temperature: 93°C (199.4°F)
Number of Wells: 3
Typical Depth: 150 m (492.1 ft)
Flow: 50 L/min (13 gpm)
TDS: 1000 mg/L
Current Use: N/A
HDD: 2006°F
Design Temperature: 29°F
Remarks: 3 wells. Located within 3 miles of Desert Hot Springs.

Hemet

Latitude: 33.7333
Longitude: 116.9833
Population: 38000
Resource Temperature: 54°C (129.2°F)
Number of Wells: 1
Typical Depth: N/A
Flow: N/A
TDS: N/A
Current Use: baths/pools
HDD: 1819°F
Design Temperature: 33°F
Remarks: 1 spring. Located within 4 miles of Hemet. Proposed area of study.

Lake Elsinore

Latitude: 33.6667
Longitude: 117.3333
Population: 19200
Resource Temperature: 54°C (129.2°F)
Number of Wells: 1
Typical Depth: N/A
Flow: N/A
TDS: N/A
Current Use: baths/pools
HDD: 1819°F
Design Temperature: 33°F
Remarks: 1 spring. Located within 5 miles of Lake Elsinore. Proposed area of study.

Temecula

Latitude: 33.4833
Longitude: 117.1500
Population: 27400
Resource Temperature: 54°C (129.2°F)
Number of Wells: 1
Typical Depth: N/A
Flow: N/A
TDS: N/A
Current Use: baths/pools
HDD: 1532°F
Design Temperature: 39°F
Remarks: 1 spring. Located within 3 miles of Temecula. Proposed area of study.

Widomar

Latitude: 33.6000
Longitude: 117.2667
Population: 10411
Resource Temperature: 54°C (129.2°F)
Number of Wells: 1
Typical Depth: N/A
Flow: N/A
TDS: N/A
Current Use: Baths/pools
HDD: 1819°F
Design Temperature: 33°F
Remarks: 1 spring. Located within 5 miles of Widomar. Proposed area of study.

Winchester

Latitude: 33.7000
Longitude: 117.0833
Population: 1689
Resource Temperature: 54°C (129.2°F)
Number of Wells: 1
Typical Depth: N/A
Flow: N/A
TDS: N/A
Current Use: Baths/pools
HDD: 1819°F
Design Temperature: 33°F
Remarks: 1 spring. Located within 4 miles of Winchester. Proposed area of study.
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San Bernardino County

Colton

Latitude: 34.0667
Longitude: 117.3167
Population: 41350
Resource Temperature: 58°C (136.4°F)
Number of Wells: 3
Typical Depth: 259 m (849.7 ft)
Flow: N/A
TDS: N/A
Current Use: District heating
HDD: 1891°F
Design Temperature: 33°F
Remarks: 3 wells. Located within 5 miles of Colton.

Highland

Latitude: 34.1167
Longitude: 117.2000
Population: 35650
Resource Temperature: 54°C (129.2°F)
Number of Wells: 4
Typical Depth: 284 m (931.8 ft)
Flow: 18900 L/min (4993 gpm)
TDS: N/A
Current Use: N/A
HDD: 1891°F
Design Temperature: 33°F
Remarks: 4 wells. Located within 5 miles of Highland.

Red Mountain

Latitude: 35.3500
Longitude: 117.6000
Population: 200
Resource Temperature: 96°C (204.8°F)
Number of Wells: 1
Typical Depth: 236 m (774 ft)
Flow: N/A
TDS: N/A
Current Use: N/A
HDD: 2946°F
Design Temperature: 23°F
Remarks: 1 well. Located within 3 miles of Red Mountain.

San Bernardino

Latitude: 34.1167
Longitude: 117.3000
Population: 171600
Resource Temperature: 59°C (138°F)
Number of Wells: 9
Typical Depth: 167 m (547.9 ft)
Flow: 605 L/min (160 gpm)
TDS: 1150 mg/L
Current Use: District heating system
HDD: 1819°F
Design Temperature: 33°F
Remarks: 6 springs and 3 wells. Located within 5 miles of San Bernardino.

Trona

Latitude: 35.7667
Longitude: 117.3667
Population: 1400
Resource Temperature: 58°C (136.4°F)
Number of Wells: 1
Typical Depth: 183 m (600.4 ft)
Flow: N/A
TDS: 53900 mg/L
Current Use: N/A
HDD: 2946°F
Design Temperature: 27°F
Remarks: 1 well. Located within 5 miles of Trona.

Twentynine Palms

Latitude: 34.1333
Longitude: 116.0500
Population: 11950
Resource Temperature: 63°C (145.4°F)
Number of Wells: 2
Typical Depth: 122 m (400.3 ft)
Flow: N/A
TDS: 1000 mg/L
Current Use: N/A
HDD: 2006°F
Design Temperature: 29°F
Remarks: 2 wells. Located within 3.5 miles of Twentynine Palms.
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San Diego County

San Diego

Latitude: 32.8220
Longitude: 117.2191
Population: 1168300
Resource Temperature: 73°C (163.4°F)
Number of Wells: 2
Typical Depth: 1855 m (6085 ft)
Flow: N/A
TDS: N/A
Current Use: N/A
HDD: 1507°F
Design Temperature: 44°F
Remarks: 2 wells. Located within 1 mile of San Diego.

Warner Springs

Latitude: 33.2833
Longitude: 116.6333
Population: 30
Resource Temperature: 56°C (132.8°F)
Number of Wells: 1
Typical Depth: N/A
Flow: 500 L/min (132 gpm)
TDS: 244 mg/L
Current Use: baths/pools and space heating
HDD: 1532°F
Design Temperature: 39°F
Remarks: 1 spring. Located within 0.5 miles of Warner Springs.
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San Luis Obispo County

San Luis Obispo

Latitude: 35.2833
Longitude: 120.6500
Population: 42600
Resource Temperature: 55°C (131°F)
Number of Wells: 1
Typical Depth: 609 m (1998 ft)
Flow: 189 L/min (50 gpm)
TDS: 815 mg/L
Current Use: baths/pools and space heating.
HDD: 2472°F
Design Temperature: 33°F
Remarks: 1 well. Located within 4 miles of San Luis Obisbo.
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Santa Barbara County

Gaviota

Latitude: 34.4677
Longitude: 120.2783
Population: 70
Resource Temperature: 68°C (154.4°F)
Number of Wells: 1
Typical Depth: N/A
Flow: N/A
TDS: N/A
Current Use: N/A
HDD: 3053°F
Design Temperature: 33°F
Remarks: 1 spring. Located within 1 mile of Gaviota.

Montecito

Latitude: 34.5397
Longitude: 119.5620
Population: 11500
Resource Temperature: 56°C (132.8°F)
Number of Wells: 1
Typical Depth: N/A
Flow: 760 L/min (201 gpm)
TDS: 690 mg/L
Current Use: N/A
HDD: 2470°F
Design Temperature: 36°F
Remarks: 1 spring. Located within 5 miles of Montecito.
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Shasta County

Big Bend

Latitude: 41.0167
Longitude: 121.9167
Population: 150
Resource Temperature: 82°C (179.6°F)
Number of Wells: 3
Typical Depth: 250 m (820.2 ft)
Flow: 481 L/min (127 gpm)
TDS: 1940 mg/L
Current Use: Space heating for a local school.
HDD: 5474°F
Design Temperature: 11°F
Remarks: 2 springs and 1 well. Located within 0.5 miles of Big Bend.
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Sierra County

Loyalton

Latitude: 39.6667
Longitude: 120.2333
Population: 930
Resource Temperature: 94°C (201.2°F)
Number of Wells: 4
Typical Depth: 335 m (1099.1 ft)
Flow: 153 L/min (40 gpm)
TDS: 1600 mg/L
Current Use: Irrigation and direct use in baths/pools.
HDD: 6022°F
Design Temperature: 10°F
Remarks: 4 wells. Located within 5 miles of Loyalton.
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Sonoma County

Boyes Hot Springs / Sonoma

Latitude: 38.3167
Longitude: 122.4833
Population: 5937
Resource Temperature: 53.1°C (127.6°F)
Number of Wells: 2
Typical Depth: 396 m (1299.2 ft)
Flow: 757 L/min (200 gpm)
TDS: 1287 mg/L
Current Use: Direct use in baths/pools and space heating
HDD: 3311°F
Design Temperature: 30°F
Remarks: 1 spring and 1 well. Located within 0.5 miles of Boyes Hot Springs and 2 miles of Sonoma.
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Ventura County

Ojai / Meiners Oaks

Latitude: 34.4500
Longitude: 119.2333
Population: 7650
Resource Temperature: 51°C (123.8°F)
Number of Wells: 2
Typical Depth: N/A
Flow: 217 L/min (57 gpm)
TDS: 1110 mg/L
Current Use: N/A
HDD: 2470°F
Design Temperature: 34°F
Remarks: 2 springs. Proposed area of study. Located within 4 miles of Meiners Oaks and 6 miles of Ojai.
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Phone: (541) 885-1750
Fax: (541) 885-1754
geoheat@oit.edu

This page was last updated on January 1, 2008 by the Geo-Heat Center
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http://geoheat.oit.edu/califor.htm