Water Conservation
Middle Ranch Reservoir
The Middle Ranch Reservoir, also known as Thompson’s Reservoir, is the main gauge for assessing the fresh water supply conditions for Santa Catalina Island.
The measured water level triggers the different stages of water conservation and rationing as laid out in the Schedule 14.1 tariffs. For more information regarding water on Catalina visit: www.sce.com/catalina.
If you have any general questions, a dedicated Catalina customer service representative can assist you at 1-800-367-8851 (Monday through Friday 8:00 a.m. to 5:00 p.m.).
Collaborations and Resources
Catalina Island Water System Drought Contingency Plan (PDF)
Middle Ranch Reservoir Capacity (approximate) and tariff stage levels:
- 1053 Acre Feet Approximate total Capacity
- 600 Acre Feet Stage 1 Mandatory Water Conservation
- 300 Acre Feet Stage 2 Mandatory Water Rationing - 25% use reduction compared to baseline year
- 200 Acre Feet Stage 3 50% use reduction compared to baseline year
- 50 Acre Feet Stage 4 75% use reduction compared to baseline year
**1 acre foot = 325,851 gallons
News and Updates
- Stage I Mandatory Water Conservation ends, 1/17/2023.
- SCE implements Stage I Mandatory Water Conservation, 7/05/2022.
- SCE awarded funding for $10,000,000 for Water Desalination Grants, 12/6/19.
- SCE recommended funding for $10,000,000 from Proposition 1 Water Desalination Grant Program Continuous Application Process (CAP3), 10/18/19.
- SCE recommended funding for the second desalination plant from the Department of Water Resources for $3,610,575, 5/1/19. SCE awarded funding from the Proposition 1 Water Desalination Grant Program, 6/18/19.
Middle Ranch Reservoir Level
Date | (Acre Feet) | Feet Above Sea Level |
March 15, 2023 | 1053.58 | 665.00 |
March 6, 2023 | 828.52 | 659.90 |
February 27, 2023 | 807.46 | 659.40 |
February 20, 2023 | 782.47 | 658.80 |
February 14, 2023 | 770.09 | 658.50 |
February 6, 2023 | 753.70 | 658.10 |
January 30, 2023 | 737.46 | 657.70 |
January 24, 2023 | 729.40 | 657.50 |
January 17, 2023 | 702.66 | 656.83 |
January 9, 2023 | 456.41 | 649.95 |
January 4, 2023 | 441.73 | 649.48 |
December 19, 2022 | 427.96 | 649.03 |
December 12, 2022 | 429.48 | 649.08 |
December 3, 2022 | 435.58 | 649.28 |
November 28, 2022 | 435.88 | 649.29 |
November 14, 2022 | 449.50 | 649.73 |
October 28, 2022 | 458.94 | 650.03 |
October 17, 2022 | 463.70 | 650.18 |
October 10, 2022 | 466.58 | 650.27 |
October 3, 2022 | 472.36 | 650.45 |
September 20, 2022 | 492.26 | 651.06 |
September 5, 2022 | 495.90 | 651.17 |
August 22, 2022 | 503.23 | 651.39 |
August 15, 2022 | 512.99 | 651.68 |
August 9, 2022 | 521.14 | 651.92 |
July 22, 2022 | 543.94 | 652.58 |
July 6, 2022 | 559.79 | 653.03 |
June 27, 2022 | 567.61 | 653.25 |
June 20, 2022 | 578.3 | 653.54 |
June 6, 2022 | 588.90 | 653.84 |
May 12, 2022 | 629.27 | 654.93 |
April 6, 2022 | 653.19 | 655.56 |
March 9, 2022 | 663.95 | 655.84 |
February 9, 2022 | 677.91 | 656.20 |
January 5, 2022 | 687.69 | 656.45 |
December 1, 2021 | 680.25 | 656.26 |
November 3, 2021 | 698.70 | 656.73 |
October 4, 2021 | 718.17 | 657.22 |
September 3, 2021 | 761.06 | 658.28 |
August 5, 2021 | 777.92 | 658.69 |
July 7, 2021 | 812.92 | 659.53 |
June 2, 2021 | 850.21 | 660.41 |
May 3, 2021 | 872.96 | 660.94 |
April 8, 2021 | 901.58 | 661.60 |
March 3, 2021 | 921.71 | 662.06 |
February 2, 2021 | 923.03 | 662.09 |
January 6, 2021 | 923.47 | 662.10 |
December 7, 2020 | 931.83 | 662.29 |
November 6, 2020 | 938.01 | 662.43 |
October 5, 2020 | 961.07 | 662.95 |
September 5, 2020 | 980.27 | 663.38 |
August 5, 2020 | 1001.84 | 663.86 |
July 6, 2020 | 1021.72 | 664.30 |
June 4, 2020 | 1040.80 | 664.72 |
May 4, 2020 | 1053.58 | 665.99 |
April 8, 2020 | 1053.58 | 665.10 |
March 2, 2020 | 1053.58 | 665.05 |
February 3, 2020 | 1053.58 | 665.09 |
January 1, 2020 | 1053.58 | 665.10 |
December 9, 2019 | 1038.53 | 664.67 |
December 2, 2019 | 1032.16 | |
October 7, 2019 | 1033.98 | 664.57 |
September 16, 2019 | 1053.58 | |
August 5, 2019 | 1053.58 | 665.10 |
May 1, 2019 | 1053.58 | 665.13 |
March 26, 2019 | 105358 | 665.05 |
February 25, 2019 | 1053.58 | 665.18 |
February 14, 2019 | 1053.85 | 666.2 |
February 11, 2019 | 882.03 | 661.15 |
February 7, 2019 | 868.22 | 660.83 |
January 22, 2019 | 821.34 | 659.73 |
January 15, 2019 | 547.44 | 652.68 |
January 7, 2019 | 538.01 | 652.41 |
January 2, 2019 | 538.36 | 652.42 |
December 26, 2018 | 536.63 | 652.37 |
December 10, 2018 | 540.8 | 652.49 |
December 3, 2018 | 523.88 | 652.0 |
November 26, 2018 | 521.48 | 651.93 |
November 19, 2018 | 524.9 | 652.03 |
November 12, 2018 | 529.03 | 652.15 |
November 9, 2018 | 532.82 | 652.26 |
October 29, 2018 | 538.01 | 652.41 |
October 22, 2018 | 541.49 | 652.51 |
October 15, 2018 | 546.03 | 652.64 |
September 28, 2018 | 552.36 | 652.82 |
September 17, 2018 | 560.84 | 653.06 |
September 12, 2018 | 563.69 | 653.14 |
September 4, 2018 | 568.33 | 653.27 |
August 27, 2018 | 576.94 | 653.51 |
August 3, 2018 | 601.35 | 654.18 |
July 23, 2018 | 610.96 | 654.44 |
July 16, 2018 | 616.16 | 654.58 |
July 9, 2018 | 622.88 | 654.76 |
July 2, 2018 | 630.40 | 654.96 |
June 15, 2018 | 648.98 | 655.45 |
June 7, 2018 | 655.49 | 655.62 |
May 14, 2018 | 668.21 | 655.95 |
May 9, 2018 | 671.69 | 656.04 |
April 19, 2018 | 688.86 | 656.48 |
April 13, 2018 | 694.37 | 656.62 |
April 6, 2018 | 696.73 | 656.68 |
March 22, 2018 | 702.66 | 656.83 |
March 8, 2018 | 708.61 | 656.98 |
February 7, 2018 | 718.57 | 657.23 |
January 22, 2017 | 722 | 657.33 |
December 23, 2017 | 720 | 657.08 |
December 11, 2017 | 725 | |
November 28, 2017 | 726 | 657.4 |
November 13, 2017 | 726 | 657.42 |
November 9, 2017 | 726 | |
October 2017 | ||
September 19, 2017 | 733 | 657.6 |
August 24, 2017 | 734 | 657.62 |
August 8, 2017 | 736 | 657.6 |
July 13, 2017 | 729 | 657.5 |
July 7, 2017 | 729 | 657.5 |
June 29, 2017 | 725 | 657.4 |
June 22, 2017 | 724 | 657.3 |
June 15, 2017 | 716 | 657.1 |
June 8, 2017 | 710 | 657.0 |
June 1, 2017 | 704 | 656.7 |
May 25, 2017 | 692 | 656.4 |
May 18, 2017 | 684 | 656.2 |
May 11, 2017 | 673 | 655.9 |
May 4, 2017 | 657 | 655.5 |
April 27, 2017 | 646 | 655.2 |
April 20, 2017 | 634 | 654.9 |
April 13, 2017 | 619 | 654.5 |
April 6, 2017 | 604 | 654.1 |
March 30, 2017 | 589 | 653.7 |
March 23, 2017 | 571 | 653.2 |
March 16, 2017 | 556 | 652.8 |
March 9, 2017 | 538 | 652.3 |
March 7, 2017 | ||
March 2, 2017 | 524 | 651.9 |
February 23, 2017 | 507 | 651.4 |
February 16, 2017 | 292 | 643.7 |
February 9, 2017 | 287 | 643.5 |
February 2, 2017 | 283 | 643.3 |
January 26, 2017 | 283 | 643.3 |
January 19, 2017 | 137 | 636.0 |
January 12, 2017 | 133 | 635.8 |
January 5, 2017 | 131 | 635.7 |
December 30, 2016 | 129 | 635.6 |
December 22, 2016 | 127 | 635.5 |
December 16, 2016 | 123 | 635.3 |
December 8, 2016 | 123 | 635.3 |
December 1, 2016 | 123 | 635.3 |
November 23, 2016 | 123 | 635.3 |
November 17, 2016 | 121 | 635.2 |
November 3, 2016 | 123 | 635.3 |
October 27, 2016 | 125 | 635.4 |
October 21, 2016 | 125 | 635.4 |
October 13, 2016 | 127 | 635.5 |
October 6, 2016 | 127 | 635.5 |
September 29, 2016 | 131 | 635.7 |
September 22, 2016 | 133 | 635.8 |
September 15, 2016 | 135 | 635.850 |
September 8, 2016 | 137 | 635.957 |
September 1, 2016 | 139 | 636.1 |
August 25, 2016 | 141 | 636.2 |
August 18, 2016 | 145 | 636.4 |
August 11, 2016 | 147 | 636.5 |
August 4, 2016 | 151 | |
July 28, 2016 | 153 | 636.8 |
July 21, 2016 | 157 | 657.0 |
July 14, 2016 | 161 | 673.2 |
July 7, 2016 | 163 | 637.3 |
June 28, 2016 | 167 | 637.5 |
June 23, 2016 | 169 | 637.6 |
June 16, 2016 | 171 | 637.7 |
June 10, 2016 | 175 | 637.9 |
June 2, 2016 | 177 | 637.984 |
May 26, 2016 | 179 | 638.069 |
May 19, 2016 | 181 | 638.190 |
May 12, 2016 | 183 | |
May 5, 2016 | 183 | |
April 28, 2016 | 185 | |
April 21, 2016 | 187 | |
April 14, 2016 | 189 | |
April 7, 2016 | 191 | |
March 31, 2016 | 191 | |
March 25, 2016 | 193 | |
March 17, 2016 | 195 | 639.913 |
March 10, 2016 | 195 | |
March 3, 2016 | 195 | |
February 25, 2016 | 195 | |
February 18, 2016 | 197 | |
February 11, 2016 | 197 | |
February 5, 2016 | 199 | |
January 28, 2016 | 199 | |
January 21, 2016 | 199 | 639.130 |
January 7, 2016 | 199 | 639.132 |
December 23, 2015 | 199 | 639.109 |
December 17, 2015 | 199 | 639.114 |
December 10, 2015 | 201 | |
December 3, 2015 | 201 | |
November 19, 2015 | 205 | |
November 12, 2015 | 207 | |
November 5, 2015 | 209 | |
October 29, 2015 | 211 | |
October 22, 2015 | 211 | |
October 15, 2015 | 215 | |
October 1, 2015 | 217 | |
September 24, 2015 | 219 | |
September 17, 2015 | 223 | |
September 10, 2015 | 223 | |
September 3, 2015 | 225 | |
August 27, 2015 | 227 | |
August 20, 2015 | 229 | |
August 13, 2015 | 231 | |
August 6, 2015 | 233 | |
July 30, 2015 | 235 | |
July 23, 2015 | 239 | |
July 16, 2015 | 239 | |
July 9, 2015 | 241 | |
July 1, 2015 | 243 | |
June 25, 2015 | 245 | |
June 18, 2015 | 247 | |
June 11, 2015 | 249 | |
June 4, 2015 | 251 | |
May 28, 2015 | 253 | |
May 21, 2015 | 255 | |
May 14, 2015 | 257 | |
May 7, 2015 | 257 | |
April 30, 2015 | 259 | |
April 24, 2015 | 259 | |
April 16, 2015 | 261 | |
April 9, 2015 | 265 | |
April 2, 2015 | 267 | |
March 26, 2015 | 269 | |
March 19, 2015 | 271 | |
March 12, 2015 | 273 | |
March 5, 2015 | 275 | |
Feb. 26, 2015 | 275 | |
Feb. 19, 2015 | 275 | |
Feb. 12, 2015 | 277 | |
Feb. 5, 2015 | 277 | |
Jan. 29, 2015 | 277 | |
Jan. 22, 2015 | 277 | |
Jan. 15, 2015 | 277 | |
Jan. 7, 2015 | 275 | |
Dec. 30, 2014 | 277 | |
Dec. 24, 2014 | 279 | |
Dec. 18, 2014 | 279 | |
Dec. 11, 2014 | 275 | |
Dec. 4, 2014 | 275 | |
Nov. 27, 2014 | n/a | |
Nov. 20, 2014 | 273 | |
Nov. 13, 2014 | 275 | |
Nov. 6, 2014 | 277 | |
Oct. 30, 2014 | 277 | |
Oct. 23, 2014 | 277 | |
Oct. 16, 2014 | 277 | |
Oct. 9, 2014 | 279 | |
Oct. 2, 2014 | 283 | |
Sept. 25, 2014 | 283 | |
Sept. 17, 2014 | 285 | |
Sept. 11, 2014 | n/a | |
Sept. 4, 2014 | 292 | |
Aug. 29, 2014 | 289 | |
Aug. 22, 2014 | 289 | |
Aug. 14, 2014 | 307 | |
Aug. 11, 2014 | ||
Aug. 7, 2014 | 311 | |
July 31, 2014 | 316 | |
July 24, 2014 | 318 | |
July 17, 2014 | 323 | |
July 3, 2014 | 330 | |
June 25, 2014 | 337 | |
June 19, 2014 | 342 | |
June 12, 2014 | 344 | |
June 5, 2014 | 350 | |
May 28, 2014 | 355 | |
May 22, 2014 | 358 | |
May 15, 2014 | 363 | |
May 9, 2014 | 366 | |
May 1, 2014 | 371 | |
April 24, 2014 | 377 | |
April 17, 2014 | 379 | |
April 10, 2014 | 385 | |
April 2, 2014 | 388 | |
March 27, 2014 | 391 | |
March 17, 2014 | 394 | |
March 14, 2014 | 394 | |
March 3, 2014 | 394 | |
Feb. 27, 2014 | 391 | |
Feb. 20, 2014 | 391 | |
Feb. 14, 2014 | 394 | |
Feb. 7, 2014 | 394 | |
Jan. 30, 2014 | 394 | |
Jan. 24, 2014 | 394 | |
Jan. 16, 2014 | 394 | |
Jan. 9, 2014 | 396 | |
Jan. 2, 2014 | 396 | |
Dec. 26, 2013 | 399 | |
Dec. 18, 2013 | 399 | |
Dec. 12, 2013 | 399 | |
Dec. 5, 2013 | 402 | |
Nov. 26, 2013 | 399 | |
Nov. 20, 2013 | 399 | |
Nov. 14, 2013 | 402 | |
Nov. 7, 2013 | 405 | |
Oct. 31, 2013 | 405 | |
Oct. 24, 2013 | 411 | |
Oct. 17, 2013 | 414 | |
Oct. 10, 2013 | 417 | |
Oct. 3, 2013 | 420 | |
Sept. 26, 2013 | 426 | |
Sept. 12, 2013 | 435 | |
Sept. 5, 2013 | 442 | |
Aug. 28, 2013 | 448 | |
Aug. 22, 2013 | 451 | |
Aug. 15, 2013 | 460 | |
Aug. 8, 2013 | 467 | |
Aug. 1, 2013 | 483 | |
July 25, 2013 | 483 | |
July 18, 2013 | 494 | |
July 11, 2013 | 503 | |
July 3, 2013 | 514 | |
June 27, 2013 | 520 | |
June 20, 2013 | 527 | |
June 13, 2013 | 535 | |
June 6, 2013 | 542 | |
May 30, 2013 | 553 | |
May 23, 2013 | 563 | |
May 16, 2013 | 574 | |
May 7, 2013 | 582 | |
May 3, 2013 | 582 | |
April 25, 2013 | 589 | |
April 11, 2013 | 604 | |
March 28, 2013 | 615 | |
March 21, 2013 | 623 | |
March 12, 2013 | 630 | |
March 8, 2013 | 634 | |
Feb. 28, 2013 | 638 | |
Feb. 14, 2013 | 646 | |
Jan. 18, 2013 | 657 |