Metadata for WRIM Station Pages
HTML Page Created 14MAY2020

Data Source Date downloaded/created Variables Observations Description
Events TCEQ 10/07/2019 14 1168591 Sample events file from TCEQ SWQMIS Database - All Data
Results TCEQ 10/07/2019 9 12463282 Sample results file from TCEQ SWQMIS Database- All Data
wrim.raw H-GAC-Hoffman 10/07/2019 20 12433194 Statewide data, compiled events/results, data processing using SAS
wrim.data H-GAC-Hoffman 10/07/2019 32 928678 Compiled events/results, data processing using SAS, H-GAC CRP CMS
Water Quality Standards TCEQ 02/09/2015 n/a n/a Texas Surface Water Quality Standards TAC 307- transcribed by H-GAC
Screening Levels TCEQ 02/25/2016 n/a n/a Draft 2016 Guidance for Assessing and Reporting Surface Water Quality in Texas
Impairments / Concerns TCEQ 10/31/2018 28 30357 2016 IR AssessmentResults from L. Ryckman, 12/19/16, edited 10/31/18 after final 2016 IR
Station/AU assignments TCEQ 12/05/2017 2 436 Table of station/ AU assignments for 2018 IR from P. Bohanon; additional AU from HGAC records
Monitoring Station Information TCEQ 02/11/2019 49 9922 Station inventory report
Stream Segment Information TCEQ 08/30/2016 9 1161 Segment descriptions
H-GAC region stations H-GAC 06/13/2019 9 559 GIS data from H-GAC GIS Team (HGAC CMS + additional stations in bordering AU)
CMS Stations LCRA 02/11/2019 25 542 Region 12 CMS from LCRA; HGAC = SE: 341
Watershed descriptions H-GAC 10/21/2010 4 53 General watershed information compiled for 2011 BSR

 

Water Quality Montoring Station 20782
 
Link to TCEQ Watershed Data
All data from this station, assessment unit, and/or segment can be downloaded from the links below (CSV Format)
Click the link with right mouse button and select 'Save Link [target] As'
Station Data
AU Data
 

Station Description Water Body Water Body Type Watershed Segment TCEQ Assessment Unit Latitude Longitude Summer Photo Winter Photo Access Database Download Link USGS Flow Gauge Data
Lake Houston West Fork San Jacinto River Arm Under Power Lines 567 Meters East And 538 Meters North From The Intersection Of Lake Houston Classified Reservoir Lake Houston 1002 1002_06 30.02424399000 -95.21861100000 Summer Picture Winter Picture Data Download Page No USGS Gauge

 

General Monitoring Information

Data Collector Oldest Sampling Event in TCEQ Database Most Recent Sampling Event in TCEQ Database Frequency Parameter Groups
City of Houston Drinking Water Operations 09/09/2010 05/23/2019 Quarterly Field, Conventional, Bacteria

 

Watershed Information

Watershed Segment ID Water Body Segment Definition Watershed Description Water Quality Issues Watershed Map
Lake Houston 1002 Lake Houston From Lake Houston Dam in Harris County to the confluence of Spring Creek on the West Fork San Jacinto arm in Harris/Montgomery County and to the confluence of Caney Creek on the East Fork San Jacinto arm in Harris County, up to the normal pool elevation of 44.5 feet (impounds San Jacinto River)Sub-Segment 1002B: Luce Bayou (unclassified water body). From confluence with Lake Houston (Harris County) to FM 1008 (Liberty County) The west fork of Lake Houston is highly urbanized with the communities of Humble, Kingwood, and Atascocita covering most of the western portion of the watershed. Smaller developments are located on the southwest shore and the eastern shore primarily near FM1960. Smaller subdivisions dot the main portion of Lake Houston on both shores. Luce and Tarkington Bayous flow into the northeastern portion of the lake and are primarily forested lands with small ranchettes and homes scattered throughout. The City of Cleveland lies in the upper Tarkington Bayou watershed. Agricultural operations are slowly encroaching on Luce and Tarkington Bayous as the forest is cleared. Grass, hay, and low density cattle ranching are the preferred operations at this time. The aquatic life use, the fish consumption use, and the public water supply use are fully supported throughout the entire segment and all tributaries. However, the recreation use is not supported in assessment unit (AU) 1002_06 which goes from the confluence with Spring Creek downstream to the West Lake Houston Parkway. Both the geometric mean and single sample criteria in that assessment unit were exceeded. There is also a concern for bacteria in the lower portion of Lake Houston between Foley Road (on the east shore) and the dam where 26% of the single samples (83 out of 324) exceeded the standard geomean of 63 MPN/mL. Watershed Map

 
In general, the discussion of water quality issues applies only to classified portions of the watershed

 

Designated Uses for the Water Body

Designated Use Aquatic Life Use ALU Designation Source Fishery Type
Recreation Use High TSWQS Appendix A Sustainable
Fish Consumption Use High TSWQS Appendix A Sustainable
General Use High TSWQS Appendix A Sustainable
Public Water Supply Use High TSWQS Appendix A Sustainable
Aquatic Life Use High TSWQS Appendix A Sustainable

 
Additional information on aquatic life uses for unclassified water bodies can be found in Appendix D of the 2014 TCEQ Water Quality Standards
Current Standards (30 TAC Chapter 307)

 

Water Quality Standards and Screening Levels

Parameter Criterion Type Standard or Screening Level
Ammonia-N 2014 TCEQ Screening Level 0.11 mg/L
Chloride 2014 Water Quality Standard 100 mg/L
Chlorophyll a 2014 TCEQ Screening Level 26.7 Micrograms / L
Dissolved Oxygen (24-hour Mean/ Grab Screening Level) 2014 Water Quality Standard 5.0 mg/L
Dissolved Oxygen (24-hour Minimum / Grab Minimum) 2014 Water Quality Standard 3.0 mg/L
Dissolved Oxygen (grab) 2014 Water Quality Standard 5.0 mg/L
E. Coli 2014 Water Quality Standard 126 MPN/100 mL
Nitrate+nitrite 2014 TCEQ Screening Level 0.37 mg/L
Nitrate-N 2014 TCEQ Screening Level 0.37 mg/L
Orthophosphate-P 2014 TCEQ Screening Level 0.05 mg/L
Sulfate 2014 Water Quality Standard 50 mg/L
Temperature 2014 Water Quality Standard 90 Degrees F
Total Dissolved Solids 2014 Water Quality Standard 400 mg/L
Total Phosphorus 2014 TCEQ Screening Level 0.20 mg/L
pH 2014 Water Quality Standard 6.5-9.0 Standard Units

 
Source: Chapter 307 of the Texas Administrative Code (6/30/10) and current TCEQ nutrient screening levels (8/25/10)
 
 
TCEQ does not assess unclassified water bodies against general use criteria (temperature, pH, total dissolved solids, chloride, and sulfate); These criteria are included for reference only
EPA-Approved Texas Water Quality Standards
TCEQ Water Quality Standards Information
Description of Water Quality Parameters

 

Summary of Water Quality Impairments and Concerns

Station ID Bacteria Impairment Low Dissolved Oxygen Nutrient Screening Levels Exceeded for One or More Nutrients PCB
Dioxin Impairment		 Impaired Macrobenthic Community Impaired Fish Community Habitat Impairment Mercury Impairment Sediment Toxicity Shellfish Harvesting Restrictions DSHS Fish
Shellfish Consumption Advisories		 Bioaccumlative Toxics in Water
20782 X   C                  

 
Source: TCEQ 2016 Integrated Report
 
 
Impairments are identified by an 'X'
Water quality impairments and concerns apply only to the assessment unit in which this station is located
TCEQ Integrated Report
Texas Department of State Health Services Fish and Shellfish Advisories
Texas Parks and Wildlife Fish Consumption Advisories

 

Water Quality Assessment Details

Assessment Unit Assessed Use Impairment or Concern Assessed Parameter Integrated Support Code Impairment Category Integrated Support Code Impairment or Concern Details Dataset Qualifier Number of Samples Assessed Number of Samples Exceeding Standard or Screening Level Geometric Mean or Average Assessment Start Date Assessment End Date
1002_06 Recreation Use Bacteria Geomean E. coli NS 5a NS A TMDL is underway, scheduled, or will be scheduled Adequate Data (10 or More Samples) 67 1 159.52341 01DEC2007 30NOV2014
1002_06 Aquatic Life Use Dissolved Oxygen grab minimum Dissolved Oxygen Grab FS   FS   Adequate Data (10 or More Samples) 97 0 . 01DEC2007 30NOV2014
1002_06 Aquatic Life Use Dissolved Oxygen grab screening level Dissolved Oxygen Grab NC   NC   Adequate Data (10 or More Samples) 97 1 . 01DEC2007 30NOV2014
1002_06 General Use Dissolved Solids Chloride FS   FS   Adequate Data (10 or More Samples) 437 0 37.791762 01DEC2007 30NOV2014
1002_06 General Use Dissolved Solids Sulfate FS   FS   Adequate Data (10 or More Samples) 437 0 13.763158 01DEC2007 30NOV2014
1002_06 General Use Dissolved Solids Total Dissolved Solids FS   FS   Adequate Data (10 or More Samples) 628 0 184.45271 01DEC2007 30NOV2014
1002_06 Fish Consumption Use HH Bioaccumulative Toxics in water Lead FS   FS   Adequate Data (10 or More Samples) 24 0 0.2083333 01DEC2007 30NOV2014
1002_06 Fish Consumption Use HH Bioaccumulative Toxics in water Nickel FS   FS   Adequate Data (10 or More Samples) 23 0 2.2934783 01DEC2007 30NOV2014
1002_06 General Use High pH pH FS   FS   Adequate Data (10 or More Samples) 96 4 . 01DEC2007 30NOV2014
1002_06 General Use Low pH pH FS   FS   Adequate Data (10 or More Samples) 96 0 . 01DEC2007 30NOV2014
1002_06 General Use Nutrient Screening Levels Ammonia NA   NA   Level of support is based on judgment of the assessor 76 15 . 01DEC2007 30NOV2014
1002_06 General Use Nutrient Screening Levels Chlorophyll-a NA   NA   Level of support is based on judgment of the assessor 41 8 . 01DEC2007 30NOV2014
1002_06 General Use Nutrient Screening Levels Nitrate NA   NA   Level of support is based on judgment of the assessor 77 71 . 01DEC2007 30NOV2014
1002_06 General Use Nutrient Screening Levels Total Phosphorus NA   NA   Level of support is based on judgment of the assessor 76 75 . 01DEC2007 30NOV2014
1002_06 Public Water Supply Use Surface Water HH criteria for PWS average Arsenic FS   FS   Adequate Data (10 or More Samples) 24 0 2.5645833 01DEC2007 30NOV2014
1002_06 Public Water Supply Use Surface Water HH criteria for PWS average Cadmium FS   FS   Adequate Data (10 or More Samples) 24 0 0.2079167 01DEC2007 30NOV2014
1002_06 Public Water Supply Use Surface Water HH criteria for PWS average Fluoride FS   FS   Adequate Data (10 or More Samples) 147 0 0.2313946 01DEC2007 30NOV2014
1002_06 Public Water Supply Use Surface Water HH criteria for PWS average Lead FS   FS   Adequate Data (10 or More Samples) 24 0 0.2083333 01DEC2007 30NOV2014
1002_06 Public Water Supply Use Surface Water HH criteria for PWS average Nickel FS   FS   Adequate Data (10 or More Samples) 23 0 2.2934783 01DEC2007 30NOV2014
1002_06 Public Water Supply Use Surface Water HH criteria for PWS average Nitrate FS   FS   Adequate Data (10 or More Samples) 438 0 1.0715183 01DEC2007 30NOV2014
1002_06 Public Water Supply Use Surface Water HH criteria for PWS average Selenium FS   FS   Adequate Data (10 or More Samples) 24 0 0.6927083 01DEC2007 30NOV2014
1002_06 General Use Water Temperature Temperature FS   FS   Adequate Data (10 or More Samples) 104 2 . 01DEC2007 30NOV2014

 
Source: TCEQ 2016 Integrated Report
 
 
Impairments are identified by an 'X'
Water quality impairments and concerns apply only to the assessment unit in which this station is located
TCEQ Integrated Report
Texas Department of State Health Services Fish and Shellfish Advisories
Texas Parks and Wildlife Fish Consumption Advisories

 

Summary of Data Collected in the Past Seven Years
Graphs of Possible Trends from Correlation Analysis may be found at the link below
Statistically Signficant 7-YearTrends- Time Series Graph
 
Description of Water Quality Parameters

Parameter Units Start Date End Date Number of Samples Standard or Screening Level Exceedances Percent Exceedance Minimum Value Maximum Value Mean Value Median Value Geometric Mean Standard Deviation 90th Percentile P-Value Time Correlation Possible Trends
Alkalinity mg/L 06/21/2012 05/23/2019 78 . . 39 138 76.9 76 . 23.9 109 0.00256 -.337 Possible Improvement
Ammonia-N mg/L 06/21/2012 05/23/2019 78 13 16.7 0.05 0.60 0.09 0.05 . 0.08 0.19 0.03536 -.239 Possible Improvement
Chloride mg/L 06/21/2012 05/23/2019 77 2 2.6 10 108 44.4 38 . 23.4 78 0.00875 -.297 Possible Improvement
Chlorophyll a Micrograms / L 07/19/2012 07/13/2017 20 1 5.0 1.50 45.00 6.3 4.00 . 9.67 11.00 . .  
Dissolved Oxygen (grab) mg/L 06/21/2012 05/23/2019 78 2 1.3 4.00 17.60 8.60 8.45 . 2.19 11.20 . .  
E. Coli MPN / 100 mL 06/21/2012 05/23/2019 78 40 51.3 1 12000 480 130 108 1413 1000 . .  
Enterococci MPN / 100 mL 07/19/2012 07/13/2017 19 . . 5 520 134 31 45 173 440 . .  
Nitrate-N mg/L 06/21/2012 05/23/2019 77 68 88.3 0.11 8.39 2.62 2.02 . 2.02 5.93 0.00292 -.335 Possible Improvement
Secchi Transparency Meters 06/21/2012 05/23/2019 77 . . 0.13 0.60 0.34 0.32 . 0.12 0.52 0.00154 -.355 Possible Improvement
Specific Conductance Microsiemens / cm 06/21/2012 05/23/2019 78 . . 131 759 353 315 . 153 565 0.00100 -.366 Possible Improvement
Sulfate mg/L 06/21/2012 05/23/2019 77 0 0.0 3 34 16.7 14 . 8.6 30 0.00058 -.383 Possible Improvement
Temperature Degrees C 06/21/2012 05/23/2019 78 0 0.0 9.1 32.9 22.6 23.4 . 6.9 31.0 . .  
Total Kjeldahl Nitrogen mg/L 07/19/2012 07/13/2017 20 . . 0.30 3.40 1.58 1.55 . 0.66 2.35 . .  
Total Phosphorus mg/L 06/21/2012 05/23/2019 78 75 96.2 0.05 1.84 0.71 0.60 . 0.39 1.21 0.00001 -.469 Possible Improvement
Total Suspended Solids mg/L 06/21/2012 05/23/2019 73 . . 7 351 54 38 . 50.1 100 . .  
pH Standard Units 06/21/2012 05/23/2019 78 3 3.8 6.6 9.2 7.8 7.6 . 0.59 8.8 . .  

 
Statistics in this table apply to the time period selected by H-GAC for analysis; additional data is available in the TCEQ Surface Water Monitoring Information System database
P-value and time correlation derived from nonparametric correlation analysis of concentration and collection date; trends identified have not been confirmed by other methods and should not be considered definitive
Exceedance statistics reflect samples that exceed single-sample or geometric mean criteria published in Chapter 307 of the Texas Administrative Code (6/30/10), or TCEQ nutrient screening levels
Nutrient data (chlorophyll a, nitrate nitrogen, total phosphorus, ammonia nitrogen, and orthophosphate phosphorus) are not collected at all stations
A time correlation of 'M' indicates that all sample values were identical; regresssion statistics are not valid

 

Most Recent Sampling Event in SWQMIS

Station_ID Sample Depth Sample Date Time Collector Parameter Parameter
Code		 GTLT Value Units Standard / Screening level
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Alkalinity 00410   56 Mg / L  
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Ammonia-N 00610 < 0.1 Mg / L 0.11 mg/L
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Chloride 00940   24 Mg / L 100 mg/L
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Days Since Last Rain 72053   7 Mg / L  
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Dissolved Oxygen (grab) 00300   8.3 Mg / L 5.0 mg/L
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations E. Coli 31699   21 MPN / 100 mL 126 MPN/100 mL
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Nitrate-N 00620   0.63 Mg / L 0.37 mg/L
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Secchi Transparency 00078   0.17 Meters  
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Specific Conductance 00094   272 Microsiemens / cm  
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Sulfate 00945   8 Mg / L 50 mg/L
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Temperature 00010   27.2 Degrees C 90 Degrees F
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Total Phosphorus 00665   0.3 Mg / L 0.20 mg/L
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations Total Suspended Solids 00530   75 Mg / L  
20782 0.3 05/23/2019 10:50 City of Houston Drinking Water Operations pH 00400   7.9 Standard Units 6.5-9.0 Standard Units