USGS Water Data for the Nation Help System

USGS - science for a changing world

USGS Home
Contact USGS
Search USGS

National Water Information System: Web Interface

USGS Water Resources

Data Category:
Geographic Area:

Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins

Due to a lapse in government funding, this website will not be updated except to provide important public safety information. For more information please visit: www.doi.gov/shutdown.

Explore the NEW USGS National Water Dashboard interactive map to access real-time water data from over 13,500 stations nationwide.

USGS Water Data for the Nation Help System

Click to hide state-specific text

How to navigate around this site

How to use the search criteria

Available types and uses

Descriptions and definitions

Descriptions and definitions

USGS users help

Introduction
We welcome user suggestions that provide insight into how we can make this site easier to understand. Please send all feedback to Maryland Water Data Maintainer.

Glossary of hydrologic terms available on the USGS Water Science for schools site.

How to Cite this website in a publication.

USGS Guidelines and Standard Procedures for Studies of Groundwater Quality: Selection and Installation of Wells, and Supporting Documentation. Water-Resources Investigations Report 96-4233. USGS WRIR 96-4233 -- This is a 2.1 megabyte complete pdf file.

NATIONAL WATER INFORMATION SYSTEM (NWIS) U.S. Geological Survey, Fact Sheet FS-027-98

About USGS

Questions or Comments
Help

Data Tips
Explanation of terms
Subscribe for system changes

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
Title: USGS Water Data for the Nation Help System
URL: https://waterdata.usgs.gov/md/nwis/help?

Page Contact Information: Maryland Water Data Maintainer
Page Last Modified: 2025-10-01 22:45:41 EDT
0.49 0.48 sdww01