Water Quailty Flashcards
What are 97% of earths waters made of
Brackish or saline
How much of earths water is fresh
0.62%
What is minimum public water supply specs
at least 25 people, and min 15 connection
What minerals does percolating through soil bring?
Ca, Mg, Fe, Mn
What are the four major types of water pollution
Agricultural runoff, urban runoff, Domestic waste water discharge, Industrial waste water discharge
What are point and non point sources
Point come from a single place, non point come from various sources
What are the water quality parameters
Physical, chemical, microbiological,radiological
What is turbidity
Measure of waters clarity
What are total solids
suspended and dissolved solids in water or wastewater.
What are suspended solids
Portion of the total solids that can be removed/filtered out.
What causes true color
Dissolved substances, leaves, wood organic compound. Inorganics such as Fe and Mn also
What causes apparent color
suspended materials in water.
What causes taste and odor compounds
Algae, bacterial degradation of algae
What is the Threshold odor number TON
The greatest dilution at which no odor is detected
What is DO concentration (Dissolved oxygen)
Important parameter for assesssing water quailty. It is a function of temperature , salinity, and pressure. DO increases as temp decreases
How much DO should lakes and river have
5-6 mg/L
What is biochemical oxygen demand BOD
The amount of DO that is needed for microorganisms to decompose materials in water.
What is MW of C5H7O2N and 5O2
C5H7O2N=113 5O2= 5x32=160
how much oxygen is needed to oxidize 1 chem compound such as C5H7O2N
1.42g/1g chem comp
What is typical BOD of domestic and industrial wastewater
dom-200mg/L Indust- 1500mg/L
How does the COD test work
Measures the oxygen equivalent of organic matter using a stong oxidizing agent in an acidic environment The amount of oxygen required is the amount of oxidation material consumed..
what is ph range and meaning
0-14, 7 neuteral above is alkaline below is acidic
What are the 3 US drinking water standards
Maximum Contaminate level, Primary drinking-enforcable health approved standards, secondary drinking standards- non enforable based on aesthetic.
