About Queries The National Pesticide Information Retrieval System worked closely with the California Department of Pesticide Regulation to develop Internet access to datasets that are of significant value to both organizations. In addition, the public, chemical and agricultural industries will also find these data to be of use. Brief registration information on approximately 90,000 products is online. The data include: product number and name, company number and name, registration date, cancellation date, existing stocks date, and reason (if cancelled), and product manager name and phone number. In addition, OPP's databases containing chemical ingredient and firm information are now available. The chemical data is searchable by common, technical, synonym, CAS number, or trade names. The firm data is searchable by firm number, name, or portions thereof. These chemical, firm, and product databases have complimentary links and are searchable by multiple variables. More information about the data and structure of EPA's PPIS can be found at: Pesticide Product Information System. With the advent of online access to PPLS (a collection of product label images in TIF format) has been linked directly to the product reports, enabling a user to look for products by any of the above criteria and then view the EPA Label image. Note: these label images reflect the master label, not a specific state registered label. Information regarding products registered in specific states can be found at our State Public website. The data resides on NPIRS' external Internet server and may be accessed using a Web browser that supports forms, such as Internet Explorer. Access the USEPA/OPP Database Menu About NPIRS' Databases For content questions contact: NPIRS User Services Phone: (765) 494-6561 1231 Cumberland Avenue, Suite A West Lafayette, IN 47906 E-mail: npirs@ceris.purdue.edu Small waterfalls called headcuts gouge stream channels ever deeper as they move upstream. The variety and vigor of the insects that biologist Sam Testa collects will reflect the level of environmental harshness or pollution in this stream.