USGS Water-Quality Information
USGS personnel collect a water-quality sample on the Missouri River. USGS/Photo by Kelly Brady.
Water Quality Data
National Water Information System (NWIS)
NWIS provides current and historical water-quality data.
Today's Water Conditions
Water-Quality Watch provides continuous real-time water-quality measurements.
Water-Quality Web Services
Web services automate the sharing of USGS and USEPA water-quality monitoring data.
For More Data
Additional water-quality data resources are available.
USGS in Your Area
USGS Water Science Centers are located in each state.
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Chapter A8 provides guidelines for the equipment and procedures needed to collect and process samples of bottom material for the evaluation of surface-water quality.
Table of Contents
Purpose and scope
Field manual review and revision
8.1 - Field trip preparations
8.2 - Site selection
8.2.1 - Location of sampling sites
8.2.2 - Number of sampling sites
8.3 - Sampling equipment
8.3.1 - Equipment selection
8.3.1.A - Samplers
8.3.1.B - Sieves
8.3.2 - Decontamination
8.4 - Sample collection
8.4.1 - Sampling procedures
8.4.2 - Quality-control procedures and requirements
8.4.2.A - Split samples
8.4.2.B - Concurrent replicate samples
8.5 - Sample processing
8.5.1 - Compositing and subsampling
8.5.2 - Sieving and sample handling
8.6 - Sample packaging and shipping
8.6.1 - Sample identification and packaging
8.6.2 - Shipping containers and sample shipment>
8.6.3 - Analytical services request form
8.7 - Checklist of field equipment and supplies
Conversion factors and abbreviations
Selected references and technical memorandums
Archive of Chapter A8