Lead Contamination Modeling in GroundwaterGuifang Tan

EWRE

Outline

• Introduction• Data Requisition• Visualization and Evaluation of Data• Future Work

Introduction

Lead has been found in at least 1,026 of 1,467 National Priorities List sites identified by the Environmental Protection Agency (EPA).

•What is lead?•Where does it come from?

•Burning fossil fuel•Paints•mining

•Why lead?•EPA standard (National Primary Drinking Water Reg.)•Bad health effect in children

Data Requisition

State County Suid staid site type Use well depth land use use codeFLORIDA DADE SOFL 252842080290501 GW PUBLIC SUPPLY 40 MIXED mxFLORIDA DADE SOFL 252951080251201 GW PUBLIC SUPPLY 45 MIXED mxFLORIDA DADE SOFL 254131080234401 GW PUBLIC SUPPLY 90 MIXED mxFLORIDA BROWARDSOFL 260739080162501 GW UNUSED 10 URBAN rcFLORIDA COLLIER SOFL 262151081335401 GW UNUSED 14 AG orTEXAS UVALDE SCTX 291135099495001 GW STOCK 600 MIXED mxTEXAS MEDINA SCTX 291231098565901 GW PUBLIC SUPPLY 2700 MIXED mxTEXAS MEDINA SCTX 291523099135401 GW DOMESTIC 1500 MIXED mxTEXAS UVALDE SCTX 291909099281001 GW UNUSED 1476 MIXED mxTEXAS MEDINA SCTX 292037098501201 GW PUBLIC SUPPLY 1358 MIXED mxTEXAS MEDINA SCTX 292037099082001 GW PUBLIC SUPPLY 1803 MIXED mxTEXAS UVALDE SCTX 292325099413101 GW DOMESTIC -9999 MIXED mxTEXAS UVALDE SCTX 292346099594701 GW DOMESTIC -9999 MIXED mxTEXAS UVALDE SCTX 292352099354501 GW DOMESTIC -9999 MIXED mx

Data Requisition

State County Suid staid LatDD LongDD site type Use well depthFLORIDA DADE SOFL 252842080290501 25.4783 -80.4847 GW PUBLIC SUPPLY 40FLORIDA DADE SOFL 252951080251201 25.4975 -80.4200 GW PUBLIC SUPPLY 45FLORIDA DADE SOFL 254131080234401 25.6919 -80.3956 GW PUBLIC SUPPLY 90FLORIDA BROWARDSOFL 260739080162501 26.1275 -80.2736 GW UNUSED 10FLORIDA COLLIER SOFL 262151081335401 26.3642 -81.5650 GW UNUSED 14TEXAS UVALDE SCTX 291135099495001 29.1931 -99.8306 GW STOCK 600TEXAS MEDINA SCTX 291231098565901 29.2086 -98.9497 GW PUBLIC SUPPLY 2700TEXAS MEDINA SCTX 291523099135401 29.2564 -99.2317 GW DOMESTIC 1500TEXAS UVALDE SCTX 291909099281001 29.3192 -99.4694 GW UNUSED 1476TEXAS MEDINA SCTX 292037098501201 29.3436 -98.8367 GW PUBLIC SUPPLY 1358TEXAS MEDINA SCTX 292037099082001 29.3436 -99.1389 GW PUBLIC SUPPLY 1803TEXAS UVALDE SCTX 292325099413101 29.3903 -99.6919 GW DOMESTIC -9999TEXAS UVALDE SCTX 292346099594701 29.3961 -99.9964 GW DOMESTIC -9999TEXAS UVALDE SCTX 292352099354501 29.3978 -99.5958 GW DOMESTIC -9999

Map of Groundwater Lead Concentration

Lead Groundwater Conc.

VALUE0

1 - 5

6 - 12

13 - 46

47 - 479

Groundwater Sources for Public Supply

Locations with Highest Lead Conc. In Groundwater for Public Supply

Locations with highest lead concentration in groundwater for public use

0

5

10

15

20

25

30

35

40

45

50

counties

Lea

d C

on

c. (

ug

/L)

Alken/South Carolina

Lexington/South Carolina

Lexington/South Carolina

Lexington/South Carolina

Richland/South Carolina

Sumter/South Carolina

Groundwater Sources for Domestic Use

Locations with Highest Lead Conc. In Groundwater for Domestic Use

Locations with Highest Lead Conc. in Groundwater for Domestic Use

0

5

10

15

20

25

30

35

1

Counties

Lead

Con

c. (u

g/L) Fayette/Pennsylvia

Somerset/Pennsylvia

Jefferson/Missouri

Comal/Texas

Future Work

Find what causes lead concentration is higher in eastern part of US