Sabine River Authority of Texas

Date: 6/29/99

To: Interested Parties

From: Environmental Services

RE: January 1999 Water Quality Monitoring Report

This is the Sabine River Authority Water Quality Report for January 1999. Water quality sampling was performed January 20 through January 21. Weather during January can be characterized as moderate throughout the Basin. Toledo Bend received the most rain (10 inches). Due to failure of laboratory equipment values for ammonia, nitrate & nitrite, total hardness and total alkalinity were not obtained; Values for orthophosphate, chloride and sulfate 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. Percent saturation of dissolved oxygen was in the nineties at all sites except LF20 where it was 88.2%. Very windy conditions were recorded at the Lake Tawakoni site, LT23D, and a high turbidity and low secchi depth were also recorded. Fecal coliform bacteria numbers were low at most upper basin sites. SR14 had the highest numbers with 176 cfu/100mls.

Lower Sabine Basin Including Toledo Bend to Morgan Bluff

Values measured during the January Water Quality Monitoring in the Lower Basin were consistent with water of high quality. Two Locations TB6N and BA4 had elevated fecal coliform values; Sulfates and Conductivity values were also slightly elevated at these locations. Station BCC1 had an elevated Fecal Streptococcus value. Station TB6I had a slightly elevated conductivity value. No thermal stratification was noted at any locations on Toledo Bend. Values in the Lower Basin were indicative high water quality.



Tidal Section of the Sabine Basin below Morgan Bluff

Values for stations in the tidal portion of the Sabine Basin were also consistent with water of high quality. No values in the tidal area of the Basin were outside of stream standards. Salinity was detected at one of the five sites in this section of the Basin. All of these sites had salinity values of less than 1 ppt at the surface.

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: