Discharge Water Quality Flashcards
1
Q
What does hard water do when it reacts with soap?
A
Hardness reacts with
soap to reduce its cleansing effectiveness and to form
a scum on the water surface. It interferes with foam/bubble formation.
2
Q
In aquatic systems, which microorganisms aid phosphorus recycling?
A
- Algae
- Macrophytes
- Phytoplankton
3
Q
What are the sources of color in water?
A
- Copper, iron, and manganese ions.
- Industrial colloidal solids/industrial wastes.
4
Q
Which public water systems must meet EPA minimum drinking water standards?
A
Public water supply systems with at least 15 service connections or serving 25+ people.
5
Q
What is the molar nitrogen-to-phosphorus ratio for ideal algae growth?
A
16:1
6
Q
Excess amounts of what chemical in water can lead to methemoglobinemia?
A
Nitrate
