Water
Permit Compliance System |
Safe Drinking Water System |
National Drinking Water Contaminant Occurrence Database |
Drinking Water Microbial and Disinfection Byproduct Information
Envirofacts contains water information from three EPA databases, the Permit Compliance
System, the Safe Drinking Water Information System, and the National Contaminant
Occurrence Database. If you are not already familiar with these systems, read the
following descriptions of the type of information each database contains. It is
important to remember that none of these databases assesses the quality of drinking
water.
Permit Compliance System
The Permit Compliance System (PCS) provides information on companies which have been
issued permits to discharge waste water into rivers. You can review information on when
a permit was issued and expires, how much the company is permitted to discharge, and the
actual monitoring data showing what the company has discharged.
The Water Discharge Permits Query allows you
to retrieve preselected data from the PCS database in Envirofacts. You can narrow your
search by selecting various options including facility name, geographic location,
standard industrial classification, and chemicals. You may also use the
PCS Customized Query to retrieve data and
design a query for your particular needs, using any data element available from the
Envirofacts Warehouse. Customized Queries are primarily geared toward more experienced
users. There is also information on related
laws and regulations.
For the technical user there is a graphic
model of the PCS database and
table and column information.
Safe Drinking Water Information System
The Safe Drinking Water Information System (SDWIS) contains information about public water systems and their violations of EPA's drinking water regulations. These statutes and accompanying regulations establish maximum contaminant levels, treatment techniques, and monitoring and reporting requirements to ensure that water provided to customers is safe for human consumption. The Safe Drinking Water Query will allow you to locate your drinking water supplier and view its violations and enforcement history for the last ten years. Information on related laws and regulations is also available.
For the technical user there is a graphic model of the SDWIS database and table and column information (metadata).
National Drinking Water Contaminant Occurrence Database
The National Drinking Water Contaminant Occurrence Database (NCOD) Introduction contains information for users on what the database can and cannot answer. The NCOD will be used to support EPA in identifying contaminants for regulation and developing regulations to monitor these contaminants. These data are available to download and analyze off-line; no statistical analysis has been provided. It is recommended that first time NCOD users visit the NCOD Introduction page that explains the limitations and cautions of the database before performing one of several query forms to retrieve information. The NCOD is also a result of the Safe Drinking Water Act.
For the technical user there is a graphic model of the NCOD database and table and column information (metadata).
Drinking Water Microbial and Disinfection Byproduct Information
The Drinking Water Microbial and Disinfection Byproduct Information overview contains information for users on what the database can and cannot answer. Data collected to support the Information Collection Rule (ICR) will be used to help assess the potential health effects of pathogens and disinfection byproducts, and will provide decision-makers with the information necessary to support regulatory and public health decisions. The ICR data were collected as part of a national research project to support development of national drinking water standards. They should NOT be used to determine local water systems compliance with drinking water standards, nor should they be used to make personal judgements about individual health risks. It is recommended that first time ICR users visit the ICR Overview page that explains the limitations and cautions of the database before using the ICR query forms to retrieve any information.
For the technical user there is a graphic model of the ICR database and table and column information (metadata).
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