Explore more digging deeper items!

There is a lot to know about water quality standards. To help you dive in, we've compiled an especially long list of "digging deeper" items for this lesson. Please explore the list below to keep learning!

General

Tribal water quality standards

Designated uses

Typical designated uses
Existing and designated uses
Protection of existing uses
Protecting the most sensitive uses
Protecting aquatic life
Is dilution of pollution a protected use?
Removing designated uses
Restrictions on removal of uses
Designated uses action checklist

Water quality criteria

Water quality criteria requirements
Narrative and numeric criteria defined
EPA's examples of narrative criteria
EPA support for biocriteria
EPA wetland criteria guidance
Less common criteria, more common threats
Developing a water quality criterion
Translating criteria into permit limits
Water quality criteria action checklist

Antidegradation

What is the origin of antidegradation
Federal antidegradation regulations
"De minimus" degradation
High quality water: parameter-by-parameter approach
More on Tier 2.5
Review your state's antidegradation process using NPDES permits
Antidegradation action checklist

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