enters all data
received from the Monthly
Operational Reports, bacteriological reports, and chemical reports into a specialized database called
SDWIS (Safe Drinking Water Information System). Each
public water system monitors/samples their water for various chemicals
and contaminants that has the potential to be a public health risk.
Some chemical/contaminants that systems test for are chlorine,
turbidity, total coliform, arsenic, nitrate, nitrite, just to name a
EPA maintains drinking water data in
several databases. It uses this information to help manage
environmental programs, and provides public access to the data through
are maintained in other parts of EPA.
Safe Drinking Water Information System - Federal version (SDWIS/FED):
SDWIS/FED is EPA's national regulatory compliance database for the
drinking water program. It includes information on the nation's
170,000 public water systems and violations of drinking water
Safe Drinking Water Information System - State
SDWIS/State is a data system developed by the EPA for states that aids
in maintaining the quality of drinking water information.
maintained by the Regulatory Development and Compliance Program.
Please address any comments or questions
to the program or the