Water Concept Flashcards
How much water should women and men drink?
W - 2.7 L
Men - 3.7 L
How many deaths annually attributed to unsafe water?
2 million
The quality of surface water in the U.S. is protected by which of the following legislation?
Clean Water Act
Two metals linked to developmental delays and deficits in learning abilities in children?
Lead and mercury
F30 - Fundamental Water Quality - What are the two major indicators for the presence of other contaminants? What are their limits?
Sample water:
Turbidity (<1.0 NTU)
Total Coliforms (0)
N.B. coliforms is a microorganism that includes bacteria. High coliforms = pathogens in the water
F31 - Inorganic Water Cotaminants
p1 Dissolved Metals (6 & Filter)
CALMAN:
- Copper
- Arsenic
- Lead
- Mercury 0.002 mg/L
- Antimony
- Nickel
2 filtration systems:
- RO filter (Reverse-Osmosis) = membtrana 50-80% acqua sprecata
- KDF filter (Kinetic Degradation Fluxion filter) contain granules of a copper-zync
F32 - Organic Pollutants
8 Water Contaminants + 1 Filter and 3 Health Impacts
(8) SBEV TXT e PCBs
- Styrene, Benzene, Ethylbenzene, Vinyl (0.002 mg/L)
- Toluene, Xylenes, TCE
- PCBs (0.0005 mg/L.)
(1) Activated carbon filter (GAC)
(3) Health impacts:
- cancer
- immune deficiencies
- nervous system damage
F33 - Agricultural contaminants - water must meet limits for what 4 chemicals (p1) and 1 fertilizer (p2)?
GAS 2,4 NITRATE
Drinking water limits:
p1 - Pesticides and herbicides GAS 2,4 :
- Glyphosate -
- Atrazine
- Simazine
- 2,4-D
p2 - Fertilizer: Nitrates < 50 mg/L
N.B. use Activated Carbon filter (GAC)
F33 - Agricultural contaminants: what % of streams surface and groundwater contaminated in the ’90s
- ALL streams in ag/urban/mixed use areas;
- 30-60% of groundwater
F34 - Public Water Additives (Disinfectans, Disinfectants By-Products, Fluoride)
p1 - Disinfectans
Wich are the two disinfectants to control and destroy harmful microorganisms?
- chlorine (< 0,6 mg/L)
- chloramine (< 4 mg/L)
“Activated Carbon Filter” (GAC) to limits the excessive level
F34 - Public Water Additives (Disinfectans, Disinfectants By-Products, Fluoride)
p2 - Disinfectant By-Products
Which are the two DBPs?
- Trihalomethanes (THM) < 0,08 mg/ L
- Halocetic acids (HAAs) < 0,06 mg/ L
(cancer & kidney damage)
“Activated Carbon Filter” (GAC) to limits the excessive level
F34 - Public Water Additives (Disinfectans, Disinfectants By-Products, Fluoride)
p3 - Fluoride
What are the limits for flouride?
Fluoride < 4.0 mg/L (dental fluorosis)
“RO” (Reverse osmosis) or “Distillation” are the two remediations
F34 - Public Water Additives (Disinfectans, Disinfectants By-Products, Fluoride)
Excessive exposure of chlorine/chloramine and fluoride in water can cause adverse effects. Which ones?
aesthetic mottling of the teeth, stomach discomfort, eye/skin irritation, and cancer
F35 - Periodic Drinking Water Quality Testing
p1 - Requires to document and report which substances (4)? how often is testing done and reports submitted?
p2 - What are the three requirements for the written policy t?
(Quarterly Testing, Data Record Keeping)
p1-
CALM
Copper (1,0 mg/L)
Arsenic (0,01 mg/L)
Lead (0,01 mg/L)
Mercury (0,002 mg/L)
tested quarterly reports submitted annually, kept for 3 years
p2-
- How to enforce water quality monitoring and record-keeping strategies
- Records be kept for 3 years
- Plan for taking action if dissolved metals levels exceed the limits of Feature 31
F36 - Water Treatment (Organic chemical removal, Sediment Filter, Microbial Elimination. Water Quality Maintenance, Legionella Control)
p1-2-3-5 What are the 4 types of contaminants and removal technique for each?
p4- Water Quality Maintenance documentation and sumbission?
p1-2-3-5
organic compounds → activated carbon
sediments → filter suspended solids
microbial → UVGI or NSF filter
Legionella → hazard analysis (a professional narrative that addresses the control of Legionella)
p4- annually to IWBI, kept for three years
F37 - Drinking Water Promotion (Water taste properties, Water access, Water dispencer maintance)
p1- what affect taste of water? (8)
MASSICZ e Total Dissolved Solids
Manganese (< 0,05 mg/L)
Aluminum (< 0,2 mg/L)
Sodium (< 270 mg/L)
Sulfate (< 250 mg/L)
Iron (< 0,3 mg/L)
Chloride (< 250 mg/L)
Zinc (< 5 mg/L)
Total Dissolved Solids < 500 mg/L
