EPA-OW: NRSA Water Quality 2013 (Boat):  General water quality measurements in large non-wadeable rivers

  • Summary
  • Analytes
  • Revision
  • Data and Sites
Official Method Name
Section 4: Non-Wadeable Rivers-Water Quality (of National Rivers and Streams Assessment: Field Operations Manual (2013))
Current Revision
2013
Media
WATER  (Waterbody type - Non-wadeable stream)
Instrumentation
Multiprobe sonde
Method Subcategory
Physical
Method Source
  EPA-OW
Citation
  National Rivers and Streams Assessment 2013/14: Field Operations Manual–Non-Wadeable
Protocol
EPA-841-B-12-009 - National Rivers and Streams Assessment: Field Operations Manual (2013)
Brief Method Summary
Measure dissolved oxygen (DO), pH, temperature, and conductivity using a calibrated multi-parameter water quality meter (or sonde). Take the measurements mid-channel at the Xsite. Take the readings at 0.5 m depth. Measure the site depth accurately before taking the measurements. The water chemistry samples will be analyzed for total phosphorus (TP), total nitrogen (TN), total ammonia-nitrogen (NH4), nitrate (NO3), basic anions, cations, total suspended solids (TSS), turbidity, acid neutralizing capacity (ANC, alkalinity), dissolved organic carbon (DOC), and total organic carbon (TOC). You will also collect a 2-L sample in an amber Nalgene bottle to be filtered on shore for later analysis of chlorophyll a.
Scope and Application
Methods described in this document are to be used specifically in work relating to the National Rivers and Streams Assessment. This document contains proceedures for how to take physical water quality measurements.
Applicable Concentration Range
Interferences
Take measurements at 0.5 m depth
Quality Control Requirements
Calibrate the water quality meter (or sonde) and use manufacturer's instructions
Sample Handling
Maximum Holding Time
Relative Cost
Unknown
Sample Preparation Methods
Store all samples in darkness on ice in a closed cooler.