Historic Blooms in Texas

Historical Fish Kill Events Involving the Golden Alga, Prymnesium parvum, in Texas

This page features historical data through Spring 2004. Get current bloom status.

This is a historical listing of fish kills due to toxic Golden Alga in Texas in chronological order by river basin. This chart gives the estimated number of fish killed at each event; bivalves (i.e. clams and mussels) have also been killed but are not included here.

Beginning End River Basin County(ies) Affected Waterbody(ies) Estimated # of Fish Killed
08/14/1981* 08/18/1981 Brazos Stonewall Brazos River
506,600
10/20/1982* 12/10/1982 Brazos Haskell California Creek
4,681
10/25/1988 11/06/1988 Brazos Haskell, Throckmorton California Creek, Paint Creek
43,356
04/24/1989 05/16/1989 Brazos Haskellq Paint Creek
15,162
05/02/1992 ? Brazos Stonewall Double Mountain Fork Brazos R.
700
10/05/1997 10/12/1997 Brazos Young Brazos River
640,446
06/25/1998 07/20/1998 Brazos Fisher Clear Fork of the Brazos
33,873
01/11/2001 07/15/2001 Brazos Palo Pinto Possum Kingdom Reservoir
200,027
01/27/2001 06/20/2001 Brazos Hood Lake Granbury
409,952
04/13/2001 06/21/2001 Brazos Hill, Bosque Lake Whitney
9,596
01/01/2003 04/21/2003 Brazos Palo Pinto Possum Kingdom Reservoir
1,475,212
02/03/2003 04/30/2003 Brazos Hood Lake Granbury
3,550,159
02/18/2003 05/01/2003 Brazos Hill, Bosque Lake Whitney, Brazos River
1,264,236
03/18/2003 04/10/2003 Brazos Nolan Lake Sweetwater
7,801
02/03/2003 04/30/2003 Brazos Lubbock Lubbock City Lakes 1-6
9,130
03/10/2003 04/30/2003 Brazos Lubbuck Buffalo Springs Lake
2,203
08/14/2003 08/30/2003 Brazos Young Brazos River
124,799
        Total in Brazos River Basin
8,297,933
02/10/2003 04/01/2003 Canadian Hutchinson Stilling Basin Lake Meredith
48
        Total in Canadian River Basin
48
08/12/1989 08/18/1989 Colorado Runnels Colorado River
4,080
08/16/1989 08/30/1989 Colorado Runnels Colorado River
1,723
08/30/1989 09/11/1989 Colorado Coke Colorado River
8,542
09/11/1989 09/15/1989 Colorado Coleman Colorado River
1,000
11/12/1989 11/18/1989 Colorado Mills, San Saba Colorado River
48,928
10/23/2001 10/30/2001 Colorado Howard Moss Creek Lake
6,381
10/18/2001 10/30/2001 Colorado Coke E.V. Spence Reservoir
2,213,953
01/24/2002 01/28/2002 Colorado Mitchell Colorado City Lake
4,060
11/26/2001 12/20/2001 Colorado Runnels Colorado River
5,986
01/15/2002 01/29/2002 Colorado Midland Wadley-Barrow Park Pond
6,300
01/29/2002 02/05/2002 Colorado Coke E.V. Spence Reservoir
1,223
01/29/2002 02/05/2002 Colorado Mitchell Colorado City Lake
61,781
10/09/2002 03/19/2003 Colorado Mitchell Colorado City Lake
15
01/08/2003 03/19/2003 Colorado Coke E.V. Spence Reservoir
175
01/14/2003 03/19/2003 Colorado Mitchell, Coke, Concho, Runnels Colorado River
1,199
        Total in Colorado River Basin
2,365,346
01/15/2001 03/15/2001 Red Archer Dundee State Fish Hatchery
5,121,827
03/12/2001 06/15/2001 Red Baylor, Archer Lake Diversion
309
02/282002 04/10/2002 Red Baylor Lake Kemp
7,400
01/08/2003 04/20/2003 Red Baylor Lake Kemp
329
03/24/2003 04/20/2003 Red Childress Baylor Lake
1,490
        Total in Colorado River Basin
5,131,355
04/21/1985* 04/27/1985 Rio Grande Loving Red Bluff Reservoir
10,125
10/31/1985 11/10/1985 Rio Grande Crockett, Pecos, Terrell, Val Verde Pecos River
111,459
11/19/1985* 11/20/1985 Rio Grande Val Verde Pecos River
300
11/20/1986* 12/12/1986 Rio Grande Pecos, Terrell, Val Verde, Crockett Pecos River
263,879
11/05/1988 11/16/1988 Rio Grande Reeves, Loving, Ward, Pecos, Crane, Crockett Red Bluff Reservoir, Pecos R.
1,580,320
12/06/1989 12/06/1989 Rio Grande Reeves Red Bluff Reservoir
50
11/03/1993 11/21/1993 Rio Grande Pecos, Terrell, Val Verde, Crockett Pecos River
33,124
12/05/1995 12/09/1995 Rio Grande Crockett, Terrell Pecos River
7,598
01/06/2003 02/15/2003 Rio Grande Reeves Red Bluff Reservoir
1,156
        Total in Rio Grande Basin
2,008,011
        Total
17,802,293

* Suspected due to P. parvum


Map of Texas counties affected by Golden Alga

Texas rivers affected by Golden Alga. Read details of map.

Impacts of Blooms

Current Bloom Status

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Aditional Information:

Would you like to know more?
The Biology of Golden Alga summarizes what we know about the alga and its toxins.

Where does golden alga fit compared to other single-celled organisms?
The Golden Alga Family Tree gives examples of and information about golden alga and other protists.

What does golden alga look like?
TPWD Golden Alga Images has photos of fish kills, golden algal cells, and short videos of live golden alga. These images may be used for noncommercial/educational purposes as long as TPWD is given credit and other site policies are followed.

Golden Alga Information Card: TPWD has collaborated with TCEQ and other entities to produce a golden alga information card(pdf document). The purpose of this card is to educate the public on golden alga blooms and answer some common questions. Hard copies of this card are available for free by contacting 512 389-8750.

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