1. Impairment: Sediment	Sources	Causes
	1. Ongoing systematic erosion	1. Clear cutting/lack of riparian buffers
		2. Drain maintenance
		3. Culvert problems
		4. Eroding road ditch
		5. Livestock in streams
	2. Construction sites	1. Clear cutting/lack of riparian buffers
		2. Lack of soil erosion BMPs and BMP education
		3. Drain maintenance
		4. Exposed soils
		5. Lack of resources for enforcement/inspections
		6. Site exemptions
	3. Developed areas	1. Clear cutting/lack of riparian buffers
		2. Lack of BMPs at existing developed areas
		3. Impervious surfaces
	4. Agricultural field runoff	1. Lack of BMPs (upland and riparian buffers)
		2. Exposed soils
2. Impairment: Excess NutrientsNeutriciation	Sources	Causes
	1. Developed areas and construction sites	1. Existing development pre-date stormwater management standards
		2. Soil erosion and sedimentation
		3. Impervious surfaces
	2. Fertilizers from (new) residential, commercial and golf courses	1. Overuse of fertilizers (improper application/storage)
		2. Lack of riparian buffers
		3. Lack of appropriate ordinances
	3. Illicit discharges	1. Aging development sanitary sewer infrastructure
		2. Inadequate inspection/detection and repair due to cost
		3. Lack of homeowner education
		4. Illegal septic application and trailer waste disposal
	4. Failing septic tanks	1. Old units are to small or don't meet codes
		2. Poor maintenance/lack of homeowner education
		3. Lack of a required maintenance program
	5. Agricultural runoff	1. Lack of BMPs (upland and riparian buffers)
		2. Livestock access to surface waters
	6. Pet and wildlife waste	1. Improper disposal of pet waste
		2. Ponds increase habitat for waterfowl and wildlife
3. Impairment: Pathogens	Sources	Causes
	1. Failing septic tanks	1. Old units are too small, fail or don't meet codes
		2. Lack of a required maintenance program
		3. Poor maintenance/lack of homeowner education
	2. Illicit discharges	1. Aging development sanitary sewer infrastructure
		2. Inadequate inspection/detection and repair due to cost
		3. Lack of education
		4. Illegal septic application and trailer waste disposal
	3. Pet and wildlife waste	1. Improper disposal of pet waste
	4. Livestock waste from agricultural operations	1. Lack of BMPs
	5. Rain/combined sewer overflows	1. Lack of capacity of municipal sanitary/combined sewer systems
4. Impairment: Organic Compounds and Heavy Metals	Sources	Causes
	1. Roads	1. Automobile emissions
		2. Poor road maintenance
		3. Lack of BMPs during de-icing of roads
	2. Developed areas	1. Lack of stormwater BMPs
		2. Illegal dumping
	3. Turfgrass chemicals from residential, commercial lawns	1. Improper lawn care
		2. Illegal dumping
	4. Agricultural runoff	1. Lack of upland and riparian BMPs
	5. NPDES permitted facilities	1. Inadequate inspection
	6.. Existing in-stream pollution	1. Illegal dumping
		2. Historic legal dumping
5. Impairments: Debris/Litter	Sources	Causes
	1. Roadways	1. Illegal littering/dumping
		2. Unsecured vehicle/truck loads
		3. Poor road maintenance
	2. Parks	1. Illegal littering/dumping
		2. Inadequate refuse containers
	3. Urban areas	1. Illegal littering/dumping
		2. Unsecured garbage
	4. Residential areas	1. Illegal littering/dumping
		2. Unsecured garbage
	5. Construction sites	1. Lack of adequate riparian buffers
		2. Poor site clean-up