Sabine River Authority of Texas

Date: 5/27/99

To: Interested Parties

From: Environmental Services

RE: November 1998 Water Quality Monitoring Report

This is the Sabine River Authority Water Quality Report for November 1998. Water quality sampling was performed November 17 through November 19. Weather during November can be characterized as wet throughout the Basin. Heavy rains occurred several days prior to the November Water Quality Monitoring (WQM). These rains caused high flow in the Sabine Basin during the November WQM.

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

Most of the parameters’ values seen in the Upper Basin sites are consistent with water of high quality. Water temperatures at reservoir sites were within two degrees from surface to bottom and dissolved oxygen was fairly uniform throughout the water column but LF2 and LF3 had significantly lower dissolved oxygen one meter from the bottom. Water quality parameters at most river sites were also within normal ranges. However, fecal coliform counts exceeded 200 colonies/100 mls at SR21, LF20, and SR19.

Lower Sabine Basin Including Toledo Bend to Morgan Bluff

Values measured during November WQM in the Lower Basin were indicative of the heavy rainfall received just prior to this sampling. This rainfall raised the level of Toledo Bend 2 ft within one week. Most sites in the Lower Basin demonstrated elevated Turbidity, Fecal Coliform (FC), Fecal Streptococcus (FS) and low pH values. Stations TB6N, TB6L and BA4 also had low FC/FS ratios. This indicates that fecal contamination is from animal sources. Main lake sites demonstrated normal values for all parameters. No thermal stratification was noted at any locations on Toledo Bend. Dissolved Oxygen values were within stream standards at all locations and uniform with depth at most sites. Station TB6A dissolved oxygen decreased to less than 1 mg/L in the last 6 m of depth.

 

Tidal Section of the Sabine Basin below Morgan Bluff

Values for stations in the tidal portion of the Sabine Basin were also consistent with runoff from heavy rains. All fecal coliform values were elevated in the Tidal Section of the Sabine Basin. Low pH values were also recorded at three of the five Tidal Section Sites and salinity was at detected at two of the five sites in the tidal area of the Basin. Dissolved Oxygen values were well within stream standards.

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