Sabine River Authority of Texas

Date: 6/29/99

To: Interested Parties

From: Environmental Services

RE: February 1999 Water Quality Monitoring Report

This is the Sabine River Authority Water Quality Report for February 1999. Water quality sampling was performed February 10, February 11 and February 17. Weather during February can be characterized as windy and dry as compared to recent years. Due to failure of laboratory equipment values for ammonia, total hardness and total alkalinity were not obtained at most stations. Values for nitrate & nitrite and orthophosphate, were obtained at only a few stations.

Upper Sabine Basin Above Toledo Bend Including Lake Fork and Lake Tawakoni

Most of the parameter's values seen in the Upper Basin sites are consistent with water of high quality. All of the sites sampled on Lake Fork and Lake Tawakoni had uniform temperature and dissolved oxygen levels from bottom to surface indicating complete mixing of the water column. Values recorded for percent saturation of dissolved oxygen were high at all locations. Three sites at the upper basin Lakes had values that exceeded 100%. Windy conditions were recorded at the Lake Tawakoni sites resulting in high turbidity and low secchi depths at stations LT23D and LT23C. Fecal coliform bacteria numbers were low at upper basin sites. LF20 had the highest number with 164 cfu/100mls.

Lower Sabine Basin Including Toledo Bend to Morgan Bluff

Values measured during the February Water Quality Monitoring in the Lower Basin were indicative high water quality. Station TB6N had an elevated fecal streptococcus value and a low dissolved oxygen value (4.56). This value is below the criteria for stream standards. The sulfate value at Station BA4 was slightly above stream standards for that segment. No thermal stratification was noted at any locations on Toledo Bend.


Tidal Section of the Sabine Basin below Morgan Bluff

Values for stations in the tidal portion of the Sabine Basin were also consistent with waters of high quality. Station BB1 had a slightly elevated fecal streptococcus value. All five sites in this section of the Basin had salinity values of less than 1 ppt.

This Report and additional data for these monitoring stations are available on our World Wide Web site ( If you have any questions or comments concerning this report, please contact: