Water Quality Technical Memorandums
Search the Water Quality Technical Memos:
2010 to Present
- qw2017.07 Procedures for Processing, Approving, Publishing, and Auditing Time-Series Records for Water Data [157KB PDF]
- qw2017.06 Guidelines for Collecting and Processing Suspended-Sediment Samples for Contaminant Analysis using Continuous-Flow Centrifugation [62KB PDF]
- qw2017.05 Policy and guidance on making changes to laboratory results in the QWDATA Subsystem (QWDATA) of the National Water Information System (NWIS) [107KB PDF]
- qw2017.04 Use of augmented matrix spikes and enhanced laboratory quality control (EQC) for trace-element analyses [89KB PDF]
- qw2017.03 Procedures for Identifying and Documenting Revisions to USGS Water Data [103KB PDF]
- qw2017.02 Clarification of Water Mission Area Policy on Continuous Records Processing of Time Series Data: Categorization of Groundwater, Surface Water, and Water-Quality Sites/Records [261KB PDF]
- qw2017.01 Retrospective Review and Guidance for Interpretation and Approval of Results from National Water-Quality Laboratory Methods O-4437-16 for the determination of 37 heat-purgeable volatile organic compounds (VOCs) and O-4436-16 for the determination of 49 ambient-purgeable VOCs [257KB PDF]
- qw2016.10 Policy and guidance for approval of surrogate regression models for computation of time series suspended-sediment concentrations and loads [775KB PDF]
- qw2016.09 Guidance for the Collection and Disposition of USGS Water-Quality-Data Records: Specifically Addressing Electronic Records for Field Notebooks and Calibration Notebooks [122KB PDF]
- qw2016.08 Water Mission Area Policy on Accepting Furnished Records [70KB PDF]
- qw2016.07 Revision of terminology for Data-Quality Indicator Codes in NWIS 5.2 [60KB PDF]
- qw2016.06 Required participation in the Branch of Quality Systems Standard Reference Sample Semi-Annual Proficiency Testing Project [100KB PDF]
- qw2016.05 Guidance on Annotating Results Affected by Contamination Bias, with Examples for Water Samples Affected by Co and Mn Contamination from High-Capacity Capsule Filters [600KB PDF]
- qw2016.04 Revision to Section 5.2.1.A of Chapter 5 in the National Field Manual for the Collection of Water-Quality Data: Capsule-filter procedure to process water-quality samples for inorganic constituents [225KB PDF]
- qw2016.03 Policy and Guidelines for Storing Data in the Aquatic Bioassessment Data Management System (BioData) [230KB PDF]
- qw2016.02 Supplemental guidance for coding and publishing data from NWQL Custom Method LS2437 [200KB PDF]
- qw2016.01 Publication of new chapter in the National Field Manual for the Collection of Water-Quality Data: Chapter 10, "Lakes and Reservoirs: Guidelines for Study Design and Sampling" [250KB PDF]
- qw2015.04 Retrospective Review and Guidance for Interpretation of Results from National Water Quality Laboratory Custom Method (LC2437) "Determination of Pesticides and Pesticide Degradates by Direct Aqueous Injection Liquid Chromatography-Mass Spectrometry (DAI LC-MS/MS)" [95KB PDF]
- qw2015.03 Publication of Techniques and Methods Book 4, Chapter C4 "Design, Analysis, and Interpretation of Field Quality-Control Data for Water-Sampling Projects" [70KB PDF]
- qw2015.02 Effective immediately: Required Use of the Revised Analytical Services Request (ASR) Form for Samples Received at the National Water Quality Laboratory (NWQL) [60KB PDF]
- qw2015.01 Policy and Guidelines for Archival of Surface-Water, Groundwater, and Water-Quality Model Applications [400KB PDF]
- Editable Model Archive Verification and Approval Form [an error occurred while processing this directive]
- Water Model Archive Frequently Asked Questions
- qw2014.02 Revised Template for preparing a quality-assurance plan for water-quality activities [30KB PDF]
- qw2014.01 Updated Policy for the Evaluation and Approval of Analytical Laboratory Performance for Water Mission Area Projects and Programs [55KB PDF]
- qw2013.03 New Techniques and Methods Report 1-D5 on Nitrate Sensors [30KB PDF]
- qw2013.02 Guidelines for FISP Bag Sampler Intake Efficiency Tests and Operational Velocities [310KB PDF]
- qw2013.01 Nitrogen in Whole-Water Samples
- qw12.05 Replacement of the Simple Speciation Method for Computation of Carbonate and Bicarbonate Concentrations from Alkalinity Titrations
- qw12.04 Continuous Water Quality Committee
- qw12.03 Update of Policy on Review and Publication of Discrete Water Data
- qw12.02 Policy for release of continuous water-temperature data recorded from secondary sensors at streamgages and wells
- qw12.01 Application ofthe Result-level ‘v’ Value Qualifier Code and ‘E’ Remark Code to Selected Organic Results Reported by the National Water Quality Laboratory (NWQL)
- qw11.04 Effective September 16, 2011 - The New Analytical Services Request (ASR) Form for Samples Received at the National Water Quality Laboratory (NWQL) is available for use
- qw11.03 Change to Solubility Equations for Oxygen in Water
- qw11.02 National Monitoring Network Water-Quality Sampling, Fiscal Year (FY) 2011
- qw11.01 National Stream Quality Accounting Network, Fiscal Year (FY) 2011
- qw10.07 Changes to the Reporting Convention and to Data Qualification Approaches for Selected Analyte Results Reported by the National Water Quality Laboratory (NWQL)
- qw 10.06 Effective September 13, 2010; Required use of New Analytical Services Request (ASR) Form for Samples Received at the National Water Quality Laboratory (NWQL)
- qw10.05 Policy for the mandatory storage of discrete sediment data and selected metadata in the National Water Information System, and availability of SedLOGIN software to assist in data entry
- qw10.04 Publication of Techniques and Methods Report Book 3, Chapter C4 “Guidelines and Procedures for Computing Time-Series Suspended-Sediment Concentrations and Loads from In-Stream Turbidity-Sensor and Streamflow Data,” by Patrick P. Rasmussen, John R. Gray, G. Douglas Glysson, and Andrew C. Ziegler
- qw10.03 National Monitoring Network Water-Quality Sampling, Fiscal Year (FY) 2010
- qw10.02 National Stream Quality Accounting Network, Fiscal Year (FY) 2010
- qw10.01 U.S. Geological Survey/National Park Service Call for Proposals for 2011 Projects and Revisions to Regional Deadlines and Review Process
2000 to 2009
- qw09.04 Reminders of How to Minimize Contamination of Volatile Organic Compound Samples
- qw09.03 Potential Bias in Alkaline Persulfate Analysis of Total Nitrogen in Whole Water Samples and Recommendations for Quantifying Bias in Whole Water Samples
- qw09.02 National Monitoring Network Water-Quality Sampling, Fiscal Year (FY) 2009
- qw09.01 National Stream Quality Accounting Network, Fiscal Year (FY) 2009
- qw08.06 Policy for Interpreting and Reporting of Radiological Data
- qw08.05 Appropriate Data Storage in the National Water Information System (NWIS)
- qw08.04 Nitrogen Isotope Analyses – Information and Revised Field Procedures
- qw08.03 National Monitoring Network Water-Quality Sampling, Fiscal Year (FY) 2008
- qw08.02 National Water Information System—Guidance for using CAS Registry Numbers and USEPA Substance Registry Names
- qw08.01 National Stream Quality Accounting Network, Fiscal Year (FY) 2008
- qw07.06 Field Methods -- Guidance for commercial sources for prepared microbiological media; original distributor no longer carrying recommended media
- qw07.05 Programs and Plans—Release of NASQAN ad hoc Technical Committee Report
- qw07.04 Controlling Flow of Water-Quality Data to NWISWeb
- qw07.03 Changes to the NWISWeb Aggregation and Display of Water-Quality Data
- qw07.02 National Stream Quality Accounting Network, Fiscal Year (FY) 2007
- qw07.01 Policy for the Evaluation and Approval of Analytical Laboratories
- qw06.04 Data Bases--Electronic Transmission of Analytical Laboratory Data for Entry into QWDATA Release 4.6
- qw06.03 National Water Information System - Notice of enhancements planned for the QWDATA software that will affect NWIS QWDATA batch file formats
- qw06.02 National Stream Quality Accounting Network, Fiscal Year (FY) 2006
- qw06.01 Storage of Water-Level Data for Ground Water
- qw05.03 Use of the Program HYDRA to Estimate or Modify Unit Values in ADAPS
- qw05.02 Field Methods -- Guidance for microbiological monitoring and commercial sources for microbiological media; bacteria kits discontinued on June 17, 2005
- qw05.01 National Stream Quality Accounting Network, Fiscal Year (FY) 2005
- qw04.03 Revision of NFM Chapter 6, Section 6.7 - Turbidity
- qw04.02 The Graphical Constituent Loading Analysis System (GCLAS) for computing discharges of suspended sediment and other water-quality constituents
- qw04.01 Revised Policy for the Approval of U.S. Geological Survey (USGS) Water-Quality Analytical Methods
- qw03.07 Nitrogen Isotope Analyses -- Changes in Laboratory Capabilities and Field Procedures
- qw03.06 Hydrologic Benchmark Network, Fiscal Year (FY)
- qw03.04 National Stream Quality Accounting Network, Fiscal Year (FY) 2003
- qw03.03 Changes in Parameter Names Used in the NWIS Parameter Code Dictionary
- qw03.02 DATA--Guidance for the Use of the Program HYDRA to Estimate or Modify Edited Unit Values from ADAPS
- qw03.01 Use of parameter-method code pairs in the National Water Information System (NWIS) and the process for requesting parameter codes and method codes
- qw02.15 Use of the new data-quality-indicator (DQI) field in NWIS 4_1
- qw02.14 Availability of Universal Blank Water for Inorganic and Organic Analyses
- qw02.13 Water-Quality Field Methods/National Field Manual for the Collection of Water-Quality Data
- qw02.12 Availability of S-ESTREND, a S-PLUS® based version of ESTREND
- qw02.11 Policy for Storing and Reporting Significant Figures for Chemical Data
- qw02.10 Availability of Guidance for Identifying and Correcting Small-Magnitude, Negative Values in the NWIS Water-Quality Databases
- qw02.09 Water-Quality Field Methods?phaseout of US D-77 and frame-type samplers
- qw02.08 National Park Service (NPS)/U.S. Geological Survey (USGS) Water-Quality Monitoring and Assessment (WQMA) Partnership for fiscal year (FY) 2003
- qw02.07 Subject: National Stream Quality Accounting Network, Fiscal Year (FY) 2002
- qw02.06 Data Bases--Electronic transmission of analytical laboratory data for entry into QWDATA Release 4_1
- qw02.05 Approval of Laboratories with existing National Environmental Laboratory Accreditation Conference (NELAC) accreditation
- qw02.04 National Water Quality System (NWIS) Water-Quality Software?Errors in Small Magnitude, Negative Values
- qw02.03 National Water Quality System (NWIS) QWDATA Rounding Code/update to fix errors
- qw02.02 USGS Capabilities and Plans Related to Water System Security
- qw02.01 Change in mTEC agar used for Escherichia coli determination
- qw01.07 USGS National Water Quality Laboratory Work With Others Policy
- qw01.06 Replacement of National Water Quality Laboratory Schedule 172, Determination of Trace Elements in Blank Water, with Schedule 1673
- qw01.05 Preferred Parameter Codes for Indicator Bacteria Methods
- qw01.04 National Park Service (NPS)/U.S. Geological Survey (USGS) Water-Quality Monitoring and Assessment (WQMA) Partnership for fiscal year (FY) 2001
- qw01.03 Collection and Use of Total Suspended Solids Data
- qw01.02 Guidance for Verifying and Interpreting Field Blank Determinations that ndicate High Pesticide or Trace Element Concentrations or that Show Large Numbers of Detections
- qw01.01.revised National Stream Quality Accounting Network, Fiscal Year (FY) 2001
- qw00.10 Discrete Water-Quality Data in NWISWeb
- qw00.09 Mandatory Use of New Analytical Services Request (ASR) Form for Submitting Samples to the National Water Quality Laboratory
- qw00.08 New Method for Particulate Carbon and Particulate Nitrogen
- qw00.07 Particulate Organic Carbon Supplement
- qw00.06Revised Approval of Conditional Data from the National Water Quality aboratory Lab Code 9090 -- Low-Level Volatile Organic Chemicals
- qw00.06 Approval of Conditional Data from the National Water Quality Laboratory Lab Code 9090 -- Low-Level Volatile Organic Chemicals
- qw00.05 Particulate Organic Carbon
- qw00.04 National Park Service Level 1 Water-Quality Inventory and Monitoring Program
- qw00.03 National Park Service (NPS)/Water Resources Division (WRD) Water-Quality Monitoring and Assessment (WQMA) Partnership for fiscal year (FY) 2001
- qw00.02 Policy for the Reimbursement of Costs for Quality Assurance of Water-Quality Analytical Laboratories
- qw00.01 National Stream Quality Accounting Network, Fiscal Year (FY) 2000
1990 to 1999
- qw99.04 Changes in Field Treatment Protocols and Bottle Types for Whole-Water Samples Collected for Total Ammonium plus Organic Nitrogen and Total Phosphorus Determinations
- qw99.03 National Stream Quality Accounting Network, Fiscal Year (FY) 1999
- qw99.02-sw99 Guidance for Collecting Discharge-Weighted Samples in Surface Water Using an Isokinetic Sampler. For the entire report see sw99.01.pdf
- qw99.01 Tables of Dissolved Oxygen Saturation Values
- qw98.06 Change in Nitric Acid Preservative for Trace Element Samples
- qw98.05 Policy for the Approval of U.S. Geological Survey (USGS) Water-Quality Analytical Methods
- qw98.04 Guidance for Interpretation of NWQL Schedule 2020 and 2021 VOC Data
- qw98.03 Policy for the Evaluation and Approval of Production Analytical Laboratories
- qw98.02 National Stream Quality Accounting Network, Fiscal Year (FY) 1998
- qw98.01 Hydrologic Benchmark Network, Fiscal Year (FY) 1998
- qw97.08 NWIS: New Remark Code (V) for Water-Quality Data
- qw97.07 Protocols for Collection of Water-Quality Data for Ground-Water Studies
- qw97.06 Comparison of the Suspended-Sediment Splitting Capabilities of the Churn and Cone Splitters and Attachment
- qw97.05 TMDL -- Should USGS be doing something?
- qw97.04 PUBLICATIONS--Use of Parameter Codes in Annual Data Reports
- qw97.03 Protocols for Cleaning a Teflon Cone Splitter to Produce Contaminant-Free Subsamples for Subsequent Determinations of Trace Elements
- qw97.02 Mercury Cycling in the Environment Workshop, July 7-9, 1996
- qw96.08 NATIONAL WATER INFORMATION SYSTEM--Modifications to Parameter Code Request Procedure (OWQ Tech Memo 90.10)
- qw96.07 PUBLICATIONS: "The Use of Suspended Sediment and Associated Trace Elements in Water Quality Studies" by Arthur J. Horowitz
- qw96.06 Interpretation of Data on Low-Level Concentrations of Pesticides in Water
- qw96.05 PROGRAMS AND PLANS--National Stream Quality Accounting Network (NASQAN): Fiscal Year 1996--October 1, 1995 to September 30,1996
- qw96.04 Overhead Rates in the National Water Quality Laboratory
- qw96.03 PERSONNEL--Janice R. Ward is new Assistant Chief
- qw96.02 PROGRAMS AND PLANS--National Hydrologic Benchmark Network: Fiscal Year 1996--October 1, 1995 to September 30, 1996
- qw96. Water-Quality Flood Plan
- qw95.02 Establishment of U.S. Geological Survey (USGS) laboratory for determination of chlorofluorocarbons (CFCs) in air and water samples
- qw94.16 New Preservation Techniques for Nutrient Samples
- qw94.15 Implementation of Joint District Reviews by the Office of Ground Water and the Office of Water Quality
- qw94.14 Use of National Water-Quality Assessment Program Protocols in District Projects
- qw94.13 Evaluation of the Churn Splitter for Inclusion in the Division Protocol for the Collection and Processing of Surface-Water Samples for Subsequent Determination of Trace Elements, Nutrients, and Major Ions in Filtered Water
- qw94.12 Changes in Schedule 172
- qw94.11 National Water Quality Laboratory Charge for Verification of Old Data
- qw94.10 Sample Collection, Analytical Methods, and Data Interpretation for Mercury Analyses
- qw94.09 Revision of New Division Protocol for Collecting and Processing Surface-Water Samples for Low-Level Inorganic Analyses
- qw94.08 Collection, Handling, and Analysis of Environmental Samples in Support of Regulatory Projects
- qw94.07 Findings of the Regulatory Program Work Group at the Water Quality Specialist Meeting February 3, 1993, in Albuquerque, New Mexico
- qw94.06 PROGRAM AND PLANS: New Custom Analysis Schedule (172) for Blanks
- qw94.02 EQUIPMENT--Discontinuance of field use of mercury liquid-in-glass thermometers
- qw93.13 PROGRAMS AND PLANS--Sources of Funding for the National Water Quality Laboratory
- qw93.12 Water Resources Division Nomenclature Conventions for Reporting Concentrations of Ammonium Ions and Ammonia in Natural Waters
- qw93.11 PROGRAMS AND PLANS: Implementation of the Protocol for Collecting and Processing Surface-Water Samples for Low-Level Inorganic Analyses
- qw93.10 PROGRAMS AND PLANS--(1) Disposal of petri dishes containing bacteria media, and (2) Aspergillus
- qw93.09 EQUIPMENT--Sample Splitting Devices
- qw93.07 PROGRAMS AND PLANS--Role of the U.S. Geological Survey in Programs and Projects Involving Regulation and Resource Management
- qw93.06 Trace-Element Contamination--Findings of Study on the Cleaning of Sampler Caps, Nozzles, Bottles, and Bags for Trace-Element Work at the Part-Per-Billion Level
- qw93.05 PROGRAMS AND PLANS--Evaluation of Capsule Filters
- qw93.04 ANALYTICAL METHODS--Discontinuation of the National Water Quality Laboratory determinations for "total" nitrite, "total" nitrite plus nitrate, "total" ammonia,and "total" orthophosphate (using the four-channel analyzer)
- qw93.03 PROGRAMS AND PLANS--Dissolved Trace-Element Data
- qw92.13 Trace Element Contamination: Findings of Studies on the Cleaning of Membrane Filters and Filtration Systems
- qw92.12 PROGRAMS AND PLANS--Trace Element Concentrations in Deionized Water Processed Through Selected Surface-Water Samplers: Study Results and Implications
- qw92.11 FIELD TECHNIQUES--Return of Spent Mercury and Dichromate Ampoules to the National Water Quality Laboratory
- qw92.10 PROGRAMS AND PLANS--Phosphorus Methods and the Quality of Phosphorus Data
- qw92.09 PROGRAMS AND PLANS--Immunoassay Field Screening Tests for Pesticides
- qw92.08 PROGRAMS AND PLANS--Nutrient Sample Size Reduction
- qw92.06 Report of Committee on Sample Shipping Integrity and Cost
- qw92.05 PROGRAMS AND PLANS--Quality of Existing Dissolved Trace-Element Data
- qw92.04 PUBLICATIONS--Revised Statement Regarding Dissolved Trace-Element Data Production
- qw92.02 FIELD TECHNIQUES--Field Preparation of Containers for Aqueous Samples
- qw92.01 Distilled/Deionized Water for District Operations
- qw91.10 PROGRAMS AND PLANS--Dissolved Trace Element Data
- qw91.09 REPORTS--"Filtration of Water-Sediment Samples for the Determination of Organic Compounds" by Mark W. Sandstrom
- qw91.08 PUBLICATIONS--"A Primer on Sediment-Trace Element Chemistry" (Second Edition),
- qw91.02 "Methods for Collection and Processing of Surface-Water and Bed-Material Samples for Physical and Chemical Analyses"
- qw91.01 PUBLICATIONS--"Methods for Collection and Analysis of Aquatic Biological and Microbiological Samples,"
- qw90.08 REPORTS--"A Laboratory and Field Evaluation of a Portable Immunoassay Test for Triazine Herbicides in Environmental Water Samples"
- qw90.07 SEDIMENT CHEMISTRY--Contamination from D-77 Samplers Equipped with Solenoid-Actuated Valves
- qw90.01 FIELD TECHNIQUES--Sample Preservation and Ampoule Disposal
1980 to 1989
- qw89.04 SEDIMENT CHEMISTRY--Analytical standards
- qw89.01 EQUIPMENT--pH Measurement of Low-Conductivity Waters
- qw88.07 Techniques of Water Resources Investigations (TWRI) Report, Book 5, Chapter A4, "Methods for Collection and Analysis of Aquatic"
- qw87.03 EQUIPMENT--pH Measurement in Low Conductivity Waters
- qw86.04 PUBLICATIONS--Methods for Determination of Inorganic Substances in Water and Fluvial Sediments, OFR 85-495
- qw86.03 PUBLICATIONS--Methods for Determination of Inorganic Substances in Water and Fluvial Sediments
- qw85.18 EQUIPMENT AND SUPPLIES--Sterilization of Microbiological Equipment
- qw85.17 WATER QUALITY--Compensation for Discharge in Detecting Trends in Water Quality Data
- qw85.10 WATER QUALITY--Measurement and Use of Diversity Indices for Biological Samples
- qw85.09 WATER QUALITY--Guidelines on Sampling Ground Water for Determination of Organic Compounds--With Comments on Analytical Protocols
- qw84.18 Water Quality--Preservation and Shipment of Water Samples for the Determination of Mercury.
- qw84.04 WATER QUALITY--Technical Information: Briefing Paper on Mercury
- qw84.02 PUBLICATIONS--Guidelines for Use of Water Quality Monitors
- qw83.13 PUBLICATIONS--"Quality Assurance Practices for the Chemical and Biological Analyses of Water and Fluvial Sediments," Techniques of
- qw82.06 PUBLICATIONS--Policy on Publishing Constituents with Both Field and Laboratory Values
- qw82.05 Provisional Method for Carbonate, Dissolved; Bicarbonate, Dissolved; and Carbonate Alkalinity, Dissolved; Electrometric Tritration,
- qw82.01 WATER QUALITY--Collecting Water Samples for Stable Isotope Analysis
- qw81.15 WATER QUALITY--New Tables of Dissolved Oxygen Saturation Values; Amendment of Quality of Water Technical Memorandum No. 81.11
- qw81.11 WATER QUALITY--New tables of dissolved oxygen saturation values
- qw81.08 WATER QUALITY--Electrodes for pH measurement in low-conductivity waters
- qw81.03 Manual Compositing Methods for Urban Storm-Runoff Samples
- qw81.02 EQUIPMENT AND SUPPLIES: Operation and availability--D-77 Water-Quality Sampler
- qw80.30 PUBLICATIONS: "Significance of bottom material data in evaluating water quality", by Herman R. Feltz
- qw80.28 WATER QUALITY--Analytical methods; Biochemical Oxygen Demand, Carbonaceous
- qw80.27 WATER QUALITY -- New Parameter Codes for pH, Alkalinity, Specific Conductance, and Carbonate/Bicarbonate
- qw80.18 Equipment and Supplies: Samplers--Problems with installation of plastic nozzles on samplers
- qw80.17 EQUIPMENT AND SUPPLIES--New sample splitter for water-quality samples
- qw80.11 SAFETY - WATER QUALITY: Technical Information--Briefing paper on "Water-borne diseases"
- qw80.07 EQUIPMENT & SUPPLIES--Bedload samplers; Use of Helley-Smith Sampler (Addendum to QW Branch Technical Memorandum No. 79.17)
- qw80.06 EQUIPMENT AND SUPPLIES--Samplers; color-coded nozzles for sediment samplers
- qw80.03 EQUIPMENT & SUPPLIES: Samplers--P-61 and P-63 Point-Integrating Sediment Samplers
1970 to 1979
- qw79.17 EQUIPMENT & SUPPLIES--Bedload samplers; use of Helley-Smith sampler
- qw79.16 PROGRAMS AND PLANS--Quality Assurance of Temperature Measurements
- qw79.15 PROGRAMS AND PLANS--Data Networks; unique number identification for federally funded stations
- qw79.10 Analytical Methods--Recommended procedures for calibrating dissolved oxygen meters
- qw79.08b EQUIPMENT AND SUPPLIES--Modification of the field calibration chamber for the YSI dissolved oxygen meter
- qw79.06 ORGANIZATION AND MANAGEMENT--Shipping regulations related to air shipment of dry ice
- qw78.13 WATER QUALITY: "Microbiological Monitoring for Water-Quality Assessment" by Phillip E. Greeson.
- qw78.06 WATER QUALITY: Field filtering of water samples for chemical analysis
- qw78.03 EQUIPMENT & SUPPLIES -- Churn Splitters
- qw77.10 QUALITY OF WATER BRANCH TECHNICAL MEMORANDUM NO. 77.10
- qw77.08 PUBLICATIONS: Open-File Report, Relationship of Sediment Discharge to Streamflow
- qw77.07 EQUIPMENT & SUPPLIES: Bedload Samplers--Guidelines for Application of the Helley-Smith Bedload Sampler
- qw77.06 QUALITY OF WATER BRANCH TECHNICAL MEMORANDUM NO 77.06
- qw77.03 EQUIPMENT & SUPPLIES: DH-75 Suspended-Sediment Sampler
- qw76.17 WATER QUALITY--Sampling mixtures of water and suspended sediment in streams
- qw76.04 EQUIPMENT AND SUPPLIES--Bedload Samplers
- qw76.03 EQUIPMENT AND SUPPLIES: Water-Quality Field Instrumentation
- qw75.25 WATER QUALITY--Sampling: Pesticides
- qw75.15 WATER-QUALITY DATA: Publication of Water Temperatures
- qw75.09 PROGRAMS AND PLANS--Acceptable methods for collection of water-quality data
- qw74.11 PROGRAMS AND PLANS--Data Networks, National stream quality accounting network
- qw73.16 PUBLICATIONS - "Sampling Procedures and Problems in Determining Pesticides in the Hydrologic Environment," by H. R. Feltz.;and J. K. Culbertson
- qw73.07 EQUIPMENT AND SUPPLIES--Teflon sediment sample splitters and plastic sieves
- qw73.05 PUBLICATIONS - Supplement to TWRI Book 5, Chapter A3
- qw72.13 PUBLICATION -- TWRI Book 3, Chapter C3, Computations of fluvial-sediment discharge, by George Porterfield
- qw72.04 PROGRAMS AND PLANS--Instructions for use of sediment samplers for the collection of samples to be analyzed for organic substances
- qw71.09 PROGRAMS AND PLANS--Guidelines for sampling and analysis of water-quality constituents associated with solids
- qw71.05 PROGRAMS AND PLANS - Sampling and analysis of water-quality constituents associated with suspended solids
- qw71.04 REPORTS -- Book 5 Chapter Al TWRI
- qw70.07 WATER QUALITY - Quality control of water analyses: Water-quality service units and mobile laboratories
1960 to 1969
- qw62.47 WATER QUALITY - Hardness of water
- qw61.40 PUBLICATIONS - Reference List No. 6
- qw61.39 RESEARCH - The role of limnology in quality of water research.
- qw61.35 PUBLICATIONS - Reference List. No. 5
- qw61.33 RESEARCH: Project Status Reports on Hydrologic Principles and Techniques
- qw61.32 RESEARCH: Project Status Reports on Hydrologic Principles and Techniques
- qw61.26 REPORTS AND STATISTICS - Quarterly report on activities in the Quality of Water Branch, July - September 1960.
- qw61.23 WATER, QUALITY - Policy statement on development, testing, approval, and publication of chemical and instrumental methods of water analysis.
- qw61.19 PROGRAMS AND PLANS - Revision of Public Water Supply Reports, WSP 1299 and 1300
- qw61.16 WATER, QUALITY - Cost of water analysis
- qw61.14 PUBLICATIONS: Reference List no. 4
- qw61.09 RESEARCH: Project Status Reports on Hydrologic Principles and Techniques
- qw61.01 PROGRAMS AND PLANS - Research Project: Analytical Methods of Water Chemistry
- qw60.43 PUBLICATIONS - Reference List No. 2
- qw60.41 REPORTS AND STATISTICS: Station Operation List - 1959 Water Year
- qw60.39 PUBLICATIONS - Preparation of bibliographies for publication in the formal series of Survey reports
- qw60.27 MEETINGS - Proceedings of Seminar on Minor Elements in Water
- qw60.25 Reports and statistics: Use of station numbers in annual reports
- qw60.22 PUBLICATIONS - General Branch policy on preparation, review, routing and approval of reports
- qw60.17 PROGRAMS AND PLANS - Revision of Public Water Supply Report, WSP 1299 and 1300
- qw60.13 PUBLICATIONS - Water temperature records - thermographs
- qw60.12 REPORTS AND STATISTICS - Scheduled dates for completion of annual water-supply papers
- qw60.00