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CSU ROSS High-Frequency Water Quality Sensor Dataset

Authors:
Owners:		This resource does not have an owner who is an active HydroShare user. Contact CUAHSI (help@cuahsi.org) for information on this resource.
Type:	Resource
Storage:	The size of this resource is 495.5 MB
Created:	Apr 07, 2026 at 5:45 p.m. (UTC)
Last updated:	Apr 22, 2026 at 1:07 p.m. (UTC) (Metadata update)
Published date:	Apr 22, 2026 at 1:07 p.m. (UTC)
DOI:	10.4211/hs.f6a71206b6254970a6eb1784b4f9254e
Citation:	See how to cite this resource
Content types:	CSV Content

Sharing Status:	Published
Views:	342
Downloads:	40
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Abstract

This dataset, also known as the Poudre Water Quality Network (PWQN), is an aggregation of real-time in-situ water quality monitoring stations installed across the Cache la Poudre River watershed in Northern Colorado. Operated by the Radical Open Science Syndicate (ROSS) at Colorado State University (CSU) through funding by the City of Fort Collins, City of Greeley, City of Thronton, Northern Water, and NSF Grants, the network utilizes In-Situ Inc. Aqua TROLL multiparameter sondes to collect high-frequency (15-minute) data. Equipment are generally deployed during the ice-free season (March-November) but some early years (2019-2021) may include some winter monitoring.

Current Period of Record: 03/2025 - 11/2025

The publication provides both raw and cleaned (QAQC’ed) datasets in a long-format structure, updated on an annual basis. As of 2025, the parameters collected across the network include:

Water Depth (m), Temperature (°C), Specific Conductivity (µS/cm), Dissolved Oxygen (mg/L), pH, ORP (V), Turbidity (NTU), Chlorophyll-a Fluorescence (RFU), and FDOM Fluorescence (RFU)

The cleaning process involves a multi-stage workflow, including automatic QAQC flags (via the ross.wq.tools R package), calibration drift corrections, and manual technician verification using custom Shiny tools. Cleaned data files include a value_final column and specific modifications codes to denote where drift or biofouling corrections were applied.
While sensor deployment began in 2019, this repository serves as a growing archive that is updated as historical and new data are verified. Comprehensive metadata regarding site locations, sensor methods, and technician field notes are included to ensure data provenance. Corresponding water chemistry grab samples for these sites are available via Zenodo at: https://zenodo.org/records/17887514.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Cache la Poudre Watershed

North Latitude

40.7389°

East Longitude

-104.9002°

South Latitude

40.4177°

West Longitude

-105.8835°

Temporal

Start Date:
End Date:

Content

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Related Resources

This resource belongs to the following collections:

Title	Owners	Sharing Status	My Permission
ROSS Poudre Test	Kathryn Willi	Private & Shareable	None

Credits

Funding Agencies

This resource was created using funding from the following sources:

Agency Name	Award Title	Award Number
City of Fort Collins Utilities	Poudre Water Quality Network	None
City of Greeley, City of Fort Collins, City of Thornton, Northern Water	Upper Poudre Decision Support System	None
U.S. National Science Foundation	NSF Ascend Engine: Scalable, data-driven water quality forecasting for municipal water supply	None
U.S. National Science Foundation	Convergence Accelerator Award	#24C0011

How to Cite

Struthers, S., K. Willi, J. De La Torre, M. R. Ross (2026). CSU ROSS High-Frequency Water Quality Sensor Dataset, HydroShare, https://doi.org/10.4211/hs.f6a71206b6254970a6eb1784b4f9254e

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/

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