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NATIONAL WATER QUALITY MONITORING COUNCIL

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- NWIS
- WQX

Welcome to the new Water Quality Portal

The Water Quality Portal (WQP) is the premiere source of discrete water-quality data in the United States and beyond. This cooperative service integrates publicly available water-quality data from the United States Geological Survey (USGS), the Environmental Protection Agency (EPA), and over 400 state, federal, tribal, and local agencies. Learn More

To download data complete the query below. Returning and experienced users may wish to use the Advanced Download.

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Basic

Download Water Quality Data

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Step 1 of 3 Location Parameters

Specify location parameters to describe the spatial extent of the desired dataset. Additional options are available in the Advanced Download. All fields are optional.

Country

Countries represented in the database.
Multiple selections allowed.

All Countries

No results found
Type to search

State

States from the selected country/ies.
Multiple selections allowed.

All States

No results found
Type to search

County

Counties from the selected state/s.
Multiple selections allowed.

All Counties

No results found
Type to search

Point Location

Enter latitude and longitude (positive/negative decimal degrees),
and radial distance (miles) to create a search area. Some stations
outside the continental US cannot be found using these parameters.
Example: Within: 20 miles of Latitude: 46.12 Longitude: -89.15

Within

Miles of

Lat

Long

Site Type

Site type indicates waterbody types or other locations where
water is found (atmosphere, natural/human-made features,
water uses affecting hydrological conditions). Type at least two
characters for a list to appear. Multiple selections allowed.

All Site Types

No results found
Type to search

Specify data source, date range, and sampling filters to apply to the desired dataset. Additional options are available in the Advanced Download. All fields are optional.

Data Source

Select one or multiple databases from which the data
will be retrieved. All databases are searched by default.

NWIS (USGS)

WQX (EPA)

Date Range

Provide an event start date and/or event end date to filter by.

Dates should be entered as mm-dd-yyyy

from:

to:

Sample Media

Identifies the environmental medium where a
sample was taken. Multiple selections allowed.

All Sample Media

No results found
Type to search

Characteristic Group

Groups of environmental measurements.
Multiple selections allowed. See User Guide for information
on which characteristics are included in each group.

All Characteristic Groups

No results found
Type to search

Specify a data type and file format to download. Additional options are available in the Advanced Download.

Data Profiles

Water monitoring data is delivered in a format and nomenclature
defined by the WQX Outbound Schema. Metadata on these
formats is displayed in Tables 4-12 of the User Guide.

Organization Data

Site Data Only

Project Data

Sample Results (physical/chemical metadata)

Sample Results (biological metadata)

Sample Results (narrow)

Sampling Activity

File Format

Choose a file format to
download the result set.

Comma-Separated

Tab-Separated

MS Excel 2007+

Sort Data

Sorts data by organization, monitoringLocationID,
and activityID. Sorting increases response
time. Do not check if you are manually sorting.

Download

Advanced

Specify location parameters to describe the spatial extent of the desired dataset. All fields are optional.

Country

Countries represented in the database.
Multiple selections allowed.

All Countries

No results found
Type to search

State

States from the selected country/ies.
Multiple selections allowed.

All States

No results found
Type to search

County

Counties from the selected state/s.
Multiple selections allowed.

All Counties

No results found
Type to search

Point Location

Within

miles of

Latitude Longitude

Bounding Box

Enter the North and South latitudes and the East and West longitudes
(positive/negative decimal degrees) to create a bounding box.
Example: North: 46.12, East: -89.15, South: 45.93, West: -89.68

North: South: East: West:

Site Type

All Site Types

No results found
Type to search

Organization ID

Identifies a unique business or company. Type at least two
characters for a list to appear. Multiple selections allowed.

All Organization IDs

No results found
Type to search

Site ID

Identifies a monitoring location by a unique name, number, or code. Type
at least two characters for a list to appear. Multiple selections allowed.
Examples: For NWIS site: USGS-301650089215300
For WQX site: R10BUNKER-CUA005-5

All Site IDs

0800257-CC-02 - Incorrect Lat/Longs
0800257-CC-03 - Incorrect Lat/Longs
0800257-CC-04 - Incorrect Lat/Longs
0800257-CC-05
0800257-CC-06 - Incorrect Lat/Longs
0800257-CC-07 - Incorrect Lat/Longs
0800257-CC-09 - Incorrect Lat/Longs
0800257-CC-10
0800257-CC-11 - Incorrect Lat/Longs
0800257-CC-12A
0800257-CC-13 - Incorrect Lat/Longs
0800257-CC-13A
0800257-CC-14 - Incorrect Lat/Longs
0800257-CC-15
0800257-CC-15A
0800257-CC-18 - Incorrect Lat/Longs
0800257-CC-1A
0800257-CC-20
0800257-CC-22 - Incorrect Lat/Longs
0800257-CC-23 - Incorrect Lat/Longs
No results found
Type to search

HUC

Identifies the hydrological unit up to the cataloging unit level of
precision. Multiple selections allowed. Separate multiple HUC IDs with a
semicolon (";"). Select partial HUCs using trailing wildcards ("*").
Examples: One site: 01010005
Multiple sites: 01010003;01010004
Partial HUCs: 010801*

Beta

Upstream/Downstream information can be used to help you determine where to collect water quality data based on the flow of water. Select a feature source, and optionally search for a location. Then, click a feature to select upstream/downstream navigation and enter a desired distance. These search criteria will be populated in your query.

World Topo World Relief World Imagery

NHDLPlus Flowline Network Hydro Reference

+−

Hint: Type a place and state (e.g. Franklin AZ), zip code, or area code

Feature Source

Active NWIS stream gages

HUC 12 pour points

Leaflet

Specify data source, date range, and sampling filters to apply to the desired dataset. All fields are optional.

Sample Media

Identifies the environmental medium where a
sample was taken. Multiple selections allowed.

All Sample Media

No results found
Type to search

Characteristic Group

Groups of environmental measurements.
Multiple selections allowed. See User Guide for information
on which characteristics are included in each group.

All Characteristic Groups

No results found
Type to search

Characteristics

Identifies types of environmental measurements. Also known as parameter or
analyte; nomenclature may differ across sources. Multiple selections allowed.

All Characteristics

No results found
Type to search

Project ID

Uniquely identifies a data collection
project. Multiple selections allowed.

All Project IDs

No results found
Type to search

Parameter Code(NWIS ONLY)

Identifies a characteristic using NWIS codes.
Specifying a parameter code will limit the
query to NWIS only. Multiple selections allowed.

Biological Parameters Assemblage

An association of interacting populations
of organisms in a given water body.

All Assemblages

No results found
Type to search

Taxonomic Name

Genus name, species name
in binomial nomenclature.

All Taxonomic Names

No results found
Type to search

Date Range

Provide an event start date and/or event end date to filter by.

Dates should be entered as mm-dd-yyyy from: to:

Minimum Sampling Activities Per Site

Returns only sites where at least a minimum number of
sampling activities have been reported. The default is 1.

Minimum Results Per Site

Returns only sites where at least a minimum number
of results have been reported. The default is 1.

Data Source

Select one or multiple databases from which the data
will be retrieved. All databases are searched by default.

NWIS (USGS)

WQX (EPA)

File Format

Choose a file format to
download the result set.

Comma-Separated

Tab-Separated

MS Excel 2007+

Sort Data

Sorts data by organization, monitoringLocationID,
and activityID. Sorting increases response
time. Do not check if you are manually sorting.

Data Profiles

Water monitoring data is delivered in a format and nomenclature
defined by the WQX Outbound Schema. Metadata on these
formats is displayed in Tables 4-12 of the User Guide.

Organization Data

Site Data Only

Project Data

Project Monitoring Location Weighting Data

Sample Results (physical/chemical metadata)

Sample Results (biological metadata)

Sample Results (narrow)

Sampling Activity

Sampling Activity Metrics

Result Detection Quantitation Limit Data

Biological Habitat Metrics

Query URL

Copy and share the URL of this query.

Station

Web service for downloading site data and associated metadata. Please see web services guide for additional information.

https://www.waterqualitydata.us/data/Station/search?mimeType=csv&zip=yes&providers=NWIS&providers=STORET

cURL

Web service for direct download of the selected data profile. Please see web services guide for additional information.

curl -X POST --header 'Content-Type: application/json' --header 'Accept: application/zip' -d '{"providers":["NWIS","STORET"]}' 'https://www.waterqualitydata.us/data/Station/search?mimeType=csv&zip=yes'

WFS GetFeature

OGC-compliant geospatial web services for site data and associated metadata. Please see web services guide for additional information.

https://www.waterqualitydata.us/ogcservices/wfs/?request=GetFeature&service=wfs&version=2.0.0&typeNames=wqp_sites&SEARCHPARAMS=providers%3ANWIS%7CSTORET&outputFormat=application%2Fjson

Download

What is the WQP?
Contributing orgs
Apps using the WQP
Other Water Quality Portals
Explore WQP sites

NWIS (USGS) Last Content Change: 2024-03-11

WQX (EPA) Last Content Change: 2025-03-27

Agency Contact Center

1-800-424-9067

WQX@epa.gov

Welcome to the new Water Quality Portal

Download Water Quality Data

Step 1 of 3 Location Parameters

Select Location Parameters

Filter Results

Download the Data