National Water Information System

In addition, chemical data for 661 ground-water and 627 surface-water samples were obtained from the USGS National Water Information System database. Only subsets of all available data that included analyses for major cations, anions, and pH, and had cation-anion charge balances within 20% were utilized. 

USGS (2002) National Water Information System (http // waterdata.usgs.gov/nwis/qwdata) (unpublished). 

Map of Europe at the scale of 1 1 500000 (IHME), to which more than 40 geological surveys and national geoscientific institutions on the European continent have contributed. These maps are scanned and geo-referenced, to make this unique set of groundwater-related information fit for European tools, such as the Water Information Systems of Europe (WISE), and to provide a reliable, harmonised background picture for the future. 

The data flow under the WED, from the laboratory via the national competent monitoring authority to the EU Commission and the Water Information System for Europe is complex. 

Effectiveness ofi Water Spray Mitigation Systems fior Accidental Releases ofiHydrogen Fluoride, Summary Report, National Technical Information Service, June 1989. 

ISI is available in hard copy and electronically at EPA s headquarters and regional Hbraries, and through the National Technical Information Service (NTIS). The electronic form may be installed on IBM PC-compatible computers or placed on local area networks, and mn under Microsoft WINDOWS or WordPerfect s Library program. The Macintosh version is no longer available. The 1993 update will include the ISI hardcopy, PC disks, and the PC system user manual. EPA also pubHshes ACCESS EPA, which provides sources of information, databases, and pubHcations within the EPA. Chapter 5 of that pubhcation includes important environmental databases in air and soHd waste, pesticides and toxic substances, water, and cross-program (110). EPA also provides databases accessible through EPA Hbraries, which describe the private EPA and commercial databases available to Hbrary users (111). 

Krofta, M., Wang, L.K., Barns, D., and Janas, J., Treatment of Pittsfield Raw Water for Drinking Water Production by Innovative Process Systems, U.S. Department of Commerce, National Technical Information Service, Springfield, VA, Report No. P1382118795, 87pp., February 1981. 

Authorities at the national, regional or local level may develop water supply systems. Where the water supply developer has not established a comprehensive profile of chemicals in water sources (which is often the case), it may be appropriate to seek additional information from... 

L. K. Wang, Standards and Guides of Water Treatment and Water Distribution Systems, US Dept, of Commerce, National Technical Information Service, PB88-177902/AS, Jan. 1987. 

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