Water Quality. Question: You can eliminate the harmful effects of pollutants by discharging them into water which dilutes the concentration of the pollutant. True or False?. Federal: Water quality is protected by the EPA, under the Clean Water Act of 1972 (CWA).
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You can eliminate the harmful effects of pollutants by discharging them into water which dilutes the concentration of the pollutant.
True or False?
under the Clean Water Act of 1972 (CWA).
State: State Water Resource Control Board (SWRCB)
Regional: Santa Ana Regional Water Quality Control Board (SARWQCB)
County: Orange County Stormwater Program
City: NPDES- National Pollution Discharge Elimination System
Regulation – Clean Water Act
There are 16 waterbodiesin Orange County
that are listed on the 303d List.
Impaired OC water bodies have high levels of nitrogen, phosphorous, total dissolved solids (including sediments), pH, pathogens, metals, PCB, DDT, etc. Additionally, sediments are heavily contaminated in most channels.
7-day Ceriodaphnia test
Surveys: SWAMP and CADF&G
California Rapid Assessment Method (CRAM)
A relative measure of the amount of gaseous oxygen, in the form of microscopic bubbles, dissolved in the water.
UNCE, Reno, NV
Influences/Sources – ↓ D.O.
A measure of how hot or cold something is. On a molecular level, it is a measure of energy. The higher the temperature or the more energy they have, thefaster particles move.
Units of measurement: Celsius vs. Fahrenheit?
UNCE, Reno, NV
The cloudiness of water resulting from the amount of particles suspended in the water. The more difficult it is to see through the water, the more turbid the water.
InNewport Bay, high turbidity restricts the growth and survival of eelgrass.
Nitrates & Phosphates
Nitrogen-containing compounds act as nutrients in streams and rivers.
An essential nutrient for aquatic plants and animals.
UNCE, Reno, NV
In a natural stream, nutrient cycles help to keep the ecosystem balanced and healthy.
But higher nutrient levels can cause negative effects on stream ecosystems.
A condition in which algae and aquatic plants will grow wildly (bloom) because of the availability of “food”, choke up the waterway, and use large amounts of oxygen.
“Dead Zones” = water at the sea floor is anoxic — it has very low (or completely zero) concentrations of dissolved oxygen.
Higher Nutrients in Water
Explosion in phytoplankton growth
More organic matter sinks to bottom
Bacteria deplete oxygen levels
A nitrogen-containing nutrient used for plant growth.
and agricultural pollutants such
as fertilizers or organic matter.
Effects:In excess, it is highly toxic
to aquatic life.
How much is too much? 0.09mg/L
Brain Teaser: In nature, ammonia quickly oxidizes to form nitrates. If you found high levels of ammonia in a creek, what could this fact tell you about what’s going on?
the level of acidity or alkalinity in a solution
Pure Hydrochloric Acid
Pure Sodium Hydroxide
Vinegar, Wine, Orange Juice
Rain is naturally acidic
Rapid snow melt
Photosynthesis in water higher pH
Combustion causes acids in the atmosphere
Testing for Bacteria
a subgroup of total coliform that appear in great quantities in the intestines and feces of people and animals.
a subgroup of fecal coliform found in the intestines of warm-blooded animals. Some strains cause illness.
Using Indicators: When it is expensive and difficult to test for one strain of bacteria, detection of a designated group can indicate the presence of disease-causing strains.
A measure of the ability of water to pass an electrical current.
Units of measurement: microsiemens (µS/cm) or millisiemens (mS/cm)
1,000µS/cm = 1 mS/cm
In your community