HydrionisGlobal Water Intelligence
Monitored reservoir

Lahontan Res Nr Fallon, NV

United States Geological Survey reservoir gauge 10312100 in NV, with published storage from 1960.

Storage record10312100

Storage now, against this reservoir's own record

161.78 Mm³
Stored, August 2026
40th
Percentile among 64 Augs on record
-10.8%
Against the Aug 1991–2020 average
+16.0%
Change over the 12 months to 2026-08

Storage in August 2026 was around the middle of the Aug record, ranked against 64 other Augs held for this reservoir.

Storage, 1960–2026

Monthly mean storage
749 monthly values, 1960 to 2026
Monthly mean storageMonthly mean storage: Lahontan Res Nr Fallon, NV in Mm³, from 1960.75 to 2026.5833333333333.0100200300400Mm³1960.751968.58333333333331976.41666666666671984.251995.252003.41666666666672011.252019.0833333333333Year

Monthly means of the publisher's daily record. Volume, not percentage of capacity: without a capacity whose definition is stated, fullness cannot be computed.

View the data behind this chart
Underlying data
PeriodLahontan Res Nr Fallon, NV (Mm³)
October 196025.5
November 196036.4
December 196060.6
January 196185.1
February 1961106
March 1961128
April 1961140
May 1961127
June 1961132
July 196192.0
August 196151.6
September 196127.9
October 196116.4
November 196114.8
December 196124.6
January 196238.3
February 196267.2
March 1962110
April 1962174
May 1962243
June 1962296
July 1962273
August 1962212
September 1962158
October 1962141
November 1962161
December 1962193
January 1963224
February 1963295
March 1963306
April 1963338
May 1963362
June 1963365
July 1963335
August 1963268
September 1963214
October 1963195
November 1963204
December 1963234
January 1964255
February 1964271
March 1964277
April 1964273
May 1964289
June 1964316
July 1964261
August 1964191
September 1964135
October 1964108
November 1964103
December 1964138
January 1965244
February 1965287
March 1965290
April 1965301
May 1965320
June 1965349
July 1965350
August 1965310
September 1965272
October 1965258
November 1965265
December 1965281
January 1966284
February 1966273
March 1966261
April 1966276
May 1966286
June 1966264
July 1966197
August 1966130
September 196680.1
October 196662.9
November 196665.7
December 1966115
January 1967164
February 1967231
March 1967281
April 1967307
May 1967289
June 1967335
July 1967353
August 1967313
September 1967265
October 1967237
November 1967234
December 1967253
January 1968271
February 1968289
March 1968316
April 1968320
May 1968314
June 1968307
July 1968242
August 1968178
September 1968129
October 1968104
November 1968110
December 1968151
January 1969181
February 1969234
March 1969232
April 1969224
May 1969244
June 1969340
July 1969342
August 1969289
September 1969222
October 1969196
November 1969218
December 1969261
January 1970308
February 1970319
March 1970306
April 1970294
May 1970290
June 1970341
July 1970332
August 1970261
September 1970197
October 1970180
November 1970187
December 1970223
January 1971246
February 1971275
March 1971290
April 1971291
May 1971314
June 1971370
July 1971374
August 1971309
September 1971244
October 1971218
November 1971237
December 1971277
January 1972301
February 1972322
March 1972351
April 1972350
May 1972351
June 1972372
July 1972307
August 1972225
September 1972172
October 1972176
November 1972200
December 1972230
January 1973262
February 1973291
March 1973314
April 1973323
May 1973330
June 1973363
July 1973306
August 1973233
September 1973174
October 1973154
November 1973183
December 1973235
January 1974273
February 1974316
March 1974338
April 1974333
May 1974336
June 1974363
July 1974326
August 1974261
September 1974198
October 1974167
November 1974181
December 1974218
January 1975257
February 1975303
March 1975340
April 1975330
May 1975307
June 1975373
July 1975353
August 1975283
September 1975228
October 1975203
November 1975217
December 1975231
January 1976246
February 1976259
March 1976272
April 1976274
May 1976254
June 1976209
July 1976155
August 1976127
September 197693.5
October 197690.1
November 1976108
December 1976137
January 1977168
February 1977201
March 1977230
April 1977232
May 1977203
June 1977178
July 1977134
August 197774.2
September 197729.9
October 197729.1
November 197734.0
December 197743.1
January 197875.7
February 1978119
March 1978176
April 1978248
May 1978278
June 1978331
July 1978320
August 1978255
September 1978207
October 1978193
November 1978203
December 1978233
January 1979272
February 1979280
March 1979303
April 1979335
May 1979353
June 1979373
July 1979319
August 1979254
September 1979200
October 1979161
November 1979165
December 1979196
January 1980260
February 1980288
March 1980302
April 1980296
May 1980323
June 1980322
July 1980330
August 1980275
September 1980222
October 1980193
November 1980181
December 1980214
January 1981251
February 1981270
March 1981291
April 1981294
May 1981287
June 1981269
July 1981198
August 1981130
September 198175.5
October 198160.7
November 198187.3
December 1981156
January 1982227
February 1982261
March 1982281
April 1982286
May 1982321
June 1982354
July 1982360
August 1982306
September 1982253
October 1982250
November 1982259
December 1982252
January 1983240
February 1983239
March 1983255
April 1983241
May 1983219
June 1983341
July 1983368
August 1983333
September 1983275
October 1983232
November 1983229
December 1983294
January 1984291
February 1984257
March 1984259
April 1984273
May 1984279
June 1984320
July 1984298
August 1984240
September 1984179
October 1984147
November 1984154
December 1984174
January 1985195
February 1985230
March 1985278
April 1985323
May 1985340
June 1985324
July 1985257
August 1985185
September 1985137
October 1985125
November 1985143
December 1985171
January 1986193
February 1986270
March 1986371
April 1986373
May 1986357
June 1986378
July 1986347
August 1986284
September 1986219
October 1986187
November 1986177
December 1986195
January 1987227
February 1987262
March 1987303
April 1987340
May 1987312
June 1987283
July 1987216
August 1987151
September 198796.5
October 198773.6
November 198779.4
December 1987106
January 1988140
February 1988176
March 1988205
April 1988212
May 1988198
June 1988155
July 1988100
August 198844.0
September 198815.9
October 198815.6
November 198812.6
December 198827.2
January 198944.8
February 198970.0
March 1989124
April 1989192
May 1989232
June 1989254
July 1989205
August 1989143
September 198999.4
October 198989.0
November 198993.3
April 1990232
May 1990241
June 1990212
July 1990149
August 199089.3
September 199042.2
April 1991116
May 1991114
June 1991128
July 1991102
August 199161.3
September 199126.7
April 1992104
May 199279.0
June 199249.1
July 199216.7
March 1993134
April 1993213
May 1993236
July 1993279
September 1993155
October 1993120
June 1994158
July 1994106
August 199447.0
March 1995194
April 1995268
May 1995306
June 1995348
July 1995386
August 1995357
October 1995257
November 1995240
December 1995255
January 1996282
February 1996335
March 1996349
April 1996359
May 1996388
June 1996390
July 1996362
August 1996293
September 1996235
October 1996194
November 1996187
December 1996233
January 1997373
March 1997317
April 1997355
May 1997388
June 1997390
July 1997346
August 1997282
September 1997226
October 1997192
November 1997186
December 1997204
January 1998222
February 1998247
March 1998280
April 1998324
May 1998332
June 1998361
July 1998382
August 1998336
September 1998277
October 1998256
November 1998255
December 1998273
February 1999330
March 1999343
April 1999342
May 1999346
June 1999383
July 1999363
August 1999294
September 1999239
October 1999206
December 1999206
January 2000219
February 2000245
March 2000271
April 2000279
May 2000285
June 2000289
July 2000239
August 2000178
September 2000135
October 2000106
November 200093.1
December 2000110
January 2001145
February 2001183
March 2001225
April 2001253
May 2001261
June 2001242
July 2001194
August 2001149
September 2001111
October 200184.4
November 200180.5
December 2001108
January 2002134
February 2002149
March 2002184
April 2002224
May 2002253
June 2002269
July 2002226
August 2002172
September 2002122
October 200292.2
November 200297.2
December 2002124
January 2003152
February 2003191
March 2003226
April 2003264
May 2003262
June 2003295
July 2003258
August 2003205
September 2003153
October 2003114
November 2003102
December 2003125
January 2004154
February 2004181
March 2004231
April 2004270
May 2004280
June 2004278
July 2004226
August 2004169
September 2004129
October 2004102
November 200499.9
December 2004117
January 2005141
February 2005159
March 2005181
April 2005194
May 2005224
June 2005327
July 2005315
August 2005253
September 2005195
October 2005158
November 2005140
December 2005152
January 2006247
February 2006289
March 2006336
April 2006314
May 2006330
June 2006383
July 2006366
August 2006298
September 2006237
October 2006198
November 2006186
December 2006192
January 2007204
February 2007234
March 2007274
April 2007286
May 2007284
June 2007254
July 2007198
August 2007141
September 200795.7
October 200776.5
November 200776.4
December 200798.3
January 2008121
February 2008130
March 2008142
April 2008144
May 2008133
June 2008148
July 2008111
August 200861.7
September 200824.4
October 200815.2
November 200821.3
December 200839.3
January 200957.4
February 200979.9
March 2009110
April 2009131
May 2009156
June 2009193
July 2009165
August 2009108
September 200961.1
October 200932.8
November 200915.1
December 200924.0
January 201045.4
February 201074.0
March 2010106
April 2010133
May 2010151
June 2010203
July 2010204
August 2010148
September 2010100
October 201082.8
November 201078.7
December 201097.1
January 2011131
February 2011154
March 2011186
April 2011231
May 2011238
June 2011286
July 2011369
August 2011328
September 2011263
October 2011230
November 2011221
December 2011228
January 2012239
February 2012255
March 2012265
April 2012254
May 2012239
June 2012204
July 2012148
August 201294.5
September 201252.8
October 201233.5
November 201233.5
December 201262.2
January 201388.6
February 2013109
March 2013136
April 2013153
May 2013148
June 2013128
July 201386.8
August 201341.5
September 201310.5
October 201315.1
November 201332.2
December 201347.7
January 201458.9
February 201478.6
March 2014107
April 2014113
May 201493.8
June 201474.0
July 201433.8
August 201419.6
September 201415.6
October 20146.83
November 20145.26
December 201411.4
January 201523.5
February 201539.5
March 201563.7
April 201575.0
May 201565.2
June 201530.0
July 20157.24
August 20157.29
September 20157.19
October 20157.40
November 20158.43
December 201511.4
January 201621.4
February 201649.2
March 201687.2
April 2016113
May 2016133
June 2016151
July 2016109
August 201655.2
September 201613.5
October 20167.51
November 201631.4
December 201661.1
January 2017148
February 2017261
March 2017295
April 2017280
May 2017251
June 2017335
July 2017369
August 2017323
September 2017265
October 2017230
November 2017221
December 2017251
January 2018274
February 2018294
March 2018314
April 2018345
May 2018351
June 2018354
July 2018288
August 2018218
September 2018161
October 2018127
November 2018117
December 2018128
January 2019155
February 2019196
March 2019244
April 2019250
May 2019280
June 2019355
July 2019360
August 2019297
September 2019235
October 2019198
November 2019179
December 2019190
January 2020205
February 2020217
March 2020233
April 2020247
May 2020259
June 2020251
July 2020197
August 2020138
September 202088.5
October 202064.6
November 202061.1
December 202078.0
January 202199.8
February 2021124
March 2021147
April 2021156
May 2021143
June 2021116
July 202160.5
August 202112.4
September 20216.72
October 20218.22
November 202132.0
December 202158.9
January 202294.4
February 2022118
March 2022152
April 2022182
May 2022187
June 2022183
July 2022134
August 202279.0
September 202236.2
October 202216.6
November 202224.3
December 202230.3
January 202395.2
February 2023145
March 2023169
April 2023109
May 2023122
June 2023298
July 2023364
August 2023335
September 2023295
October 2023265
November 2023250
December 2023260
January 2024277
February 2024298
March 2024324
April 2024343
May 2024363
June 2024366
July 2024312
August 2024249
September 2024198
October 2024163
November 2024146
December 2024152
January 2025168
February 2025202
March 2025243
April 2025247
May 2025249
June 2025240
July 2025196
August 2025139
September 202597.8
October 202573.7
November 202572.0
December 2025101
January 2026159
February 2026210
March 2026269
April 2026289
May 2026284
June 2026263
July 2026210
August 2026162

The reservoir's year

Seasonal storage profile
Each calendar month's reference average, against the most recent year
Seasonal storage profileSeasonal storage profile: 1991–2020 average, Most recent 12 months in Mm³, from 1 to 12.0100200300Mm³123456789101112Month1991–2020 average 1: 160 Mm³1991–2020 average 2: 187 Mm³1991–2020 average 3: 216 Mm³1991–2020 average 4: 229 Mm³1991–2020 average 5: 237 Mm³1991–2020 average 6: 250 Mm³1991–2020 average 7: 227 Mm³1991–2020 average 8: 181 Mm³1991–2020 average 9: 135 Mm³1991–2020 average 10: 119 Mm³1991–2020 average 11: 111 Mm³1991–2020 average 12: 132 Mm³Most recent 12 months 1: 159 Mm³Most recent 12 months 2: 210 Mm³Most recent 12 months 3: 269 Mm³Most recent 12 months 4: 289 Mm³Most recent 12 months 5: 284 Mm³Most recent 12 months 6: 263 Mm³Most recent 12 months 7: 210 Mm³Most recent 12 months 8: 162 Mm³Most recent 12 months 9: 97.8 Mm³Most recent 12 months 10: 73.7 Mm³Most recent 12 months 11: 72.0 Mm³Most recent 12 months 12: 101 Mm³
  • 1991–2020 average
  • Most recent 12 months

Twelve separate averages, one per calendar month. A January average describes Januaries only. Months are plotted 1–12.

View the data behind this chart
Underlying data
Period1991–2020 average (Mm³)Most recent 12 months (Mm³)
Jan160159
Feb187210
Mar216269
Apr229289
May237284
Jun250263
Jul227210
Aug181162
Sep13597.8
Oct11973.7
Nov11172.0
Dec132101

Rate and persistence

+1.86 Mm³
Mean change per month over 12 months
0 of 24
Months in the last two years below the 20th percentile for their own month

Rates are computed only across an unbroken run of months, so a rate is never divided by a period in which some of the change was not observed. Percentile counts compare each month with the same calendar month in every other year held.

Location

Lahontan Res Nr Fallon, NV
Gauge location
Lahontan Res Nr Fallon, NVLahontan Res Nr Fallon, NV — 161.78 Mm³Lahontan Res Nr Fallon, NV — 161.78 Mm³

Where this comes from

749 monthly observations 1960–2026 Mm³
Spatially aggregatedHigh confidenceAugust 2026

Source: USGS — National Water Information System, 10312100. Licence: Open.

Method: Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.

Reservoir storage is managed as well as observed: a drawdown may reflect an operating rule, flood-control rule curve or scheduled release rather than a shortage. Compare a month against the same month in other years, and do not read a fall as a supply signal without knowing the operating regime.

Retrieved 25 August 2026.

Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.

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