Municipal Water Quality and Your Health Public Health
Municipal Water Quality and Your Health Public Health Seminar Series February 3, 2004 UA, Southwest Environmental Health Sciences Center Pima County Health Department City of Tucson Water Department
Tucson Water Supply & Delivery System CRW . Water Treatment Plant Reclaimed Water Production Facilities CRW Recharge Tucson Basin Wellfield s Avra Valley Wellfield Recharge and Recovery Avra Valley Aquifer Groundwater Mtns. Wastewater Treatment Plant Recharge and Recovery Tucson Basin Aquifer
Potable System Overview
Safe Drinking Water? Clean Water Act Safe Drinking Water Act
Clean Water Act Passed 1972 SURFACE WATER Quality Purpose: “fishable, swimmable” water DRINKING WATER Quality Indirect protection of quality
Safe Drinking Water Act • Originally signed into law in 1974 • Authorizes EPA and states to set drinking water standards (regulations) • Protect drinking water supply from contamination • Limit contaminant levels in drinking water
Ground Water Test Requirements Coliform Bacteria (2) Volatile Chemicals (21) Inorganic Chemicals(15) Disinfection By. Products Lead & Copper(2) Trihalomethanes (4) Radiochemicals (3) plus Haloacetic Acids plus Uranium starting (5) and 2004 Disinfectant Residuals Synthetic Chemicals (30) starting 2004 Unregulated Contaminants (11)
How Fast Might These Contaminants Affect You? Over 90 standards 2 REST Chronic All the rest (calculated lifetime risk) “ACUTE” “CHRONIC” ACUTE Nitrate & Fecal Coliform
Protecting Public Health d e l p m a S ium d o S <0. 0 009 <0. 0245 <1 Flu 0 orid e ed z ly a n A d te r o p e R To meet regulatory requirements Tucson Water sampled, analyzed, and reported: 16, 599 drinking water results in 2001 4200 drinking water results in 2002 and 2003 16, 000 - 17, 000 drinking water results in 2004 (anticipated)
EPA & Tucson Water Sponsor EMPACT - Water Quality Information Program “Environmental Monitoring for Public Access and Community Tracking”
What’s the Quality of Our Drinking Water? Community asks for information: Sodium Hardness Mineral content (TDS) p. H Chlorine Coliform Bacteria Contamination
Expanding the Program EMPACT also Reports on Nitrate as nitrogen Fluoride Trihalomethanes Temperature
Pima County Health Department • Bacterias – – Cryptosoridium reported cs 1 -2 per year Giardia reported cs 45 per year Legionella reported cs 3 per year Fecal coliforms
Pima County Health Department • Immediate notification by media, posted signs • Diamond Bell, Mercury, and health departments role • http: //www. epa. gov/safewater/mcl. html#mcls
Near Real Time Water Quality Information
What is Tucson's Water Quality? http: //www. ci. tucson. az. us/cw/viewer. htm? Title=City%20 Water
What is My Water Quality? http: //www. ci. tucson. az. us/mw/viewer. htm? Title=My. Water
Live Example http: //swehsc. pharmacy. arizona. edu/ coep/water/index. html
Contact Info • SWEHSC – Marti Lindsey, 626 -4468, lindsey@pharmacy. arizona. edu • Pima County Health Department – Babs Johnson, 740 -8315, babsj@pimahealth. org • Tucson Water – Fernando Molina, 791 -5080 x 1469 – Dan Quintanar, 791 -5080 x 1372
Any Questions?
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