Arkansas Department of Health
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Drinking Water Information for Arkansans


Appendix A -- Glossary and Acronyms

Assessment Area: A delineated area around the intake or well head of a public water system that establishes the general boundary for Vulnerability Assessment. The area will not extend past the State boundaries and will be determined by a fixed radius, and / or topographical or hydogeological method.

Ground Water: Naturally occurring water occupying the zone of saturation in the ground below the surface of the earth.

GWUDI: Ground Water Under the Direct Influence of Surface Water. Water beneath the surface of the ground with significant occurrences of insects or other macro-organisms, algae, or large diameter pathogens such as Giardia-lamblia, or significant and relatively rapid shifts in water characteristics such as turbidity, temperature, conductivity, or pH which closely correlate to climatological or surface water conditions.

High Water Level: The line on the shore of an impoundment that is reached at the normal spillway elevation.

Off Stream Storage: A natural or man made basin used for the purpose of storing raw water for use by a public water system as a supplement to the primary source of raw water.

Median Stream Flow: The rate of flow for which there are an equal number of greater and lesser occurrences during a specified period.

Permeability Weight: A relative rating of the capacity of the aquifer material to transmit water or contaminates.

Phase I Assessment Area: The area delineated for the purpose of the Source Water Assessment Program. This is the minimum area that will be considered in the vulnerability assessment.

Phase II Assessment Area: Upon completion of vulnerability assessments for all water sources, and if resources allow, an expanded area for each source will be delineated and evaluated. The Phase II Assessment Areas will be based on either State prioritization of systems, new data acquired, or in the process of providing technical assistance in the development of a Protection Plan.

PSOC: Potential Sources of Contamination. A contaminant that has the potential to adversely affect the quality of a drinking water supply.

Significant PSOC: A contaminant that has the potential to adversely affect the quality of a drinking water supply at such a magnitude as to exceed an MCL or health advisory level.

Surface Water: Water that flows over or rests upon the surface of the earth. The term surface water includes rivers, lakes, impoundments, reservoirs, and springs in addition to other man-made and naturally occurring bodies of water on the surface of the earth.

Time of Travel: The time necessary for contaminants to travel a given distance from the source of contamination to the intake or well.


ADEQ - Arkansas Department of Environmental Quality (formerly DPC&E)
ADH - Arkansas Department of Health
AEF - Arkansas Environmental Federation
AGC - Arkansas Geological Commission
AHTD - Arkansas Highway & Transportation Department
AO&GC - Arkansas Oil & Gas Commission
ARWA - Arkansas Rural Water Association
ASWCC - Arkansas Soil & Water Conservation Commission
AWRC - Arkansas Water Resources Center
AWW & WEA - Arkansas Water Works & Water Environment Association
AWWA - American Water Works Association
BMPs - Best Management Practices
CAC - Citizen Advisory Committee
CAST - Center for Advanced Spatial Technologies
CD - Compact Disc
CERCLA - Comprehensive Environmental Response, Compensation, and Liability act
CFR - Code of Federal Regulations
CWA - Clean Water Act
CWS - Community Water System
DEM - Digital Elevation Model
DLS - Digital Line Graph
DOE - Division Of Engineering (Arkansas Department of Health)
DOQ - Digital Orthophoto Quadrangle
DRG - Digital Raster Graphics
DWSRF - Drinking Water State Revolving Fund
EAST Program - Environmental And Spatial Technologies
EPA or USEPA - Environmental Protection Agency
ERNS - Emergency Response Notification System
FOI - Freedom of Information
GIS - Geographic Information System
GPS - Global Positioning System
GWUDI - Ground Water Under the Direct Influence of surface water
MCL - Maximum Contaminant Level
MSDS - Material Safety Data Sheet
MSWLF - Municipal Solid Waste Landfill
NCWS - Non-Community Water System
NIPDWR - National Interim Primary Drinking Water Regulations
NPDES - National Pollution Discharge Elimination System
NRCS - National Resource Conservation Service
NTNCWS - Non-Transient Non-Community Water System
OES - Office of Emergency Services
PSA - Public Service Announcement
PSOC - Potential Sources Of Contamination
PWS - Public Water System
PWSSP - Public Water System Supervision Program
QA/QC - Quality Assistance/Quality Control
RCRA - Resource Conservation and Recovery Act
SDWA - Safe Drinking Water Act
SIC - Standard Industrial Codes
SSURGO - Soil Survey Geographic Data Base
STATSGO - State Soil Geographic Data Base
SWAP - Source Water Assessment Program
SWP - Source Water Protection
SWPP - Source Water Protection Program
TAC - Technical Advisory Committee
TCR - Total Coliform Rule
TNCWS - Transient Non-Community Water System
TOT - Time Of Travel
USCOE - United States Army Corps Of Engineers
USDA - United States Department of Agriculture
USFS - United States Forest Service
USGS - United States Geological Survey
UST - Underground Storage Tank
WEF - Water Environment Federation
WET Program - Water Education Team program
WHPA - Well Head Protection Area
WHPP - Wellhead Protection Program
WWTP - Waste Water Treatment Plant


For information on the national level, try EPA's Source Water Protection site



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