Welcome to the official hub for the Air Toxics and Ozone Precursors (ATOPs) program. We provide a complete ecosystem for environmental data transparency, interoperability, and scientific analysis in Colorado.
The environmental monitoring landscape is shifting. With new technologies emerging, diverse organizations—from state agencies to community groups—are collecting vast amounts of data. ATOPS develops open-source tools and data standards to help harmonize, exchange, and aggregate these disparate datasets for a cleaner, healthier Colorado.
The Air Quality Data Exchange (AQDx) standard is a universal language for air quality and weather data. It harmonizes disparate datasets through:
- Unified Vocabularies: Standardized parameter naming and measurement technology codes.
- Structured Metadata: Machine-readable YAML forms for critical experiment-level context.
- Flexible Implementations: Native support for CSV, JSON streaming, and Parquet formats.
View the Full AQDx Documentation
We believe in radical transparency. We host and maintain public environmental datasets, ensuring they are accessible, well-documented, and formatted according to modern standards for use by researchers and the public.
Beyond providing raw data, we publish our formal data analyses. This provides a "gold standard" for how environmental data is processed, interpreted, and used to inform public health decisions in Colorado.
(In Development) We are building a suite of open-source analysis scripts and software tools. These tools are designed to help users validate, process, and visualize AQDx-compliant data with ease.
- Stay Connected: Visit our official program page at CDPHE.colorado.gov/air-toxics.
Maintained by the CDPHE Air Pollution Control Division with input from the U.S. EPA and community partners.
