Pasquotank River Basin Basinwide Assessment Report Whole Effluent ...
Pasquotank River Basin Basinwide Assessment Report Whole Effluent Toxicity Program 2006-2010
The Division of Water Quality’s Whole Effluent Toxicity Monitoring Program Acute and/or chronic toxicity tests are used to determine toxicity of discharges to sensitive aquatic species (usually fathead minnows or the water flea, Ceriodaphnia dubia). dubia Results of these tests have been shown by researchers to be predictive of discharge discharge effects to receiving stream populations. Many facilities are required to monitor whole effluent toxicity (WET) by their NPDES permit. Facilities without monitoring requirements may have their effluents evaluated for toxicity by DWQ’s Aquatic Toxicology Laboratory. If toxicity is detected, DWQ may include aquatic toxicity testing upon permit renewal. DWQ’s Aquatic Toxicology Unit maintains a compliance summary for all facilities required to perform tests and provides a monthly update of this information ttoo regional offices and WQ administration. Ambient toxicity tests can be used to evaluate stream water quality relative to other stream sites and/or a point source discharge. WET Monitoring in the Pasquotank River Basin – 2006-2010 Twenty facility permits in the Pasquotank River basin currently require whole effluent toxicity (WET) monitoring (Figure 1 and Table 1). Two facility permits have a WET limit while seventeen require ire monitoring without a limit. Three facilities have active permits permit but are not discharging. All facilities are compliant for the 5 year cycle. Figure 1.
Pasquotank River basin facilities location for WET Testing
20
17
10
NCDENR, Division of Water Quality BASINWIDE ASSESSMENT REPORT – PASQUOTANK RIVER BASIN – APRIL 2006 1
Table 1. Pasquotank River basin facilities required to conduct whole effluent toxicity testing Subbasin/Facility 03-01-50 Camden Co. WTP Elizabeth City WWTP South Mills WTP 03-01-51 Manteo WWTP Skyco WTP 03-01-52 Bethel WTP Winfall WTP Pasqoutank Co. WTP 03-01-53 Columbia WTP Creswell WTP Roper WTP Bull Bay WTP Tyrrell County WTP Washington Co. WTP 03-01-54 Southern Outer Banks WTP Mainland WTP 03-01-55 Cape Hatteras WTP Rodanthe/Waves/Salvo WTP Stumpy Point WTP 03-01-56 Dare County WTP/002
Facility # on Table 1
NPDES Permit No.
Receiving Stream
7 2 16
NC0086681 NC0025011 NC0007978
Pasquotank R.
3 10
County Camden
Pasquotank R.
Pasquotank
Dismal Swamp Canal
Camden
NC0079057 NC0035670
Shallowbag Bay
Dare
UT Croatan Sound
Dare
14 15 20
NC0068861 NC0051373 NC0088480
Bethel Cr.
Perquimans
UT Mill Cr.
Perquimans
Albemarle Sound
Pasqoutank
11 13 19 6 12 18
NC0007510 NC0027600 NC0031925 NC0086924 NC0087092 NC0087009
UT Scuppernong R.
Tyrrell
UT Scuppernong R.
Washington
9 17
UT Kendrick Cr.
Washington
Bull Bay
Tyrrell
UT Riders Cr.
Tyrrell
Albemarle Sound
Washington
NC0087670 NC0088650
Atlantic Ocean
Currituck
North River
Currituck
4 5 8
NC0085707 NC0083909 NC0086932
Pamlico Sound
Dare
Blackmar Gut
Dare
Stumpy Point Bay
Dare
1
NC0070157
UT Atlantic Ocean
Dare
NCDENR, Division of Water Quality BASINWIDE ASSESSMENT REPORT – PASQUOTANK RIVER BASIN – APRIL 2006 2
The Division of Water Quality’s Whole Effluent Toxicity Monitoring Program Acute and/or chronic toxicity tests are used to determine toxicity of discharges to sensitive aquatic species (usually fathead minnows or the water flea, Ceriodaphnia dubia). dubia Results of these tests have been shown by researchers to be predictive of discharge discharge effects to receiving stream populations. Many facilities are required to monitor whole effluent toxicity (WET) by their NPDES permit. Facilities without monitoring requirements may have their effluents evaluated for toxicity by DWQ’s Aquatic Toxicology Laboratory. If toxicity is detected, DWQ may include aquatic toxicity testing upon permit renewal. DWQ’s Aquatic Toxicology Unit maintains a compliance summary for all facilities required to perform tests and provides a monthly update of this information ttoo regional offices and WQ administration. Ambient toxicity tests can be used to evaluate stream water quality relative to other stream sites and/or a point source discharge. WET Monitoring in the Pasquotank River Basin – 2006-2010 Twenty facility permits in the Pasquotank River basin currently require whole effluent toxicity (WET) monitoring (Figure 1 and Table 1). Two facility permits have a WET limit while seventeen require ire monitoring without a limit. Three facilities have active permits permit but are not discharging. All facilities are compliant for the 5 year cycle. Figure 1.
Pasquotank River basin facilities location for WET Testing
20
17
10
NCDENR, Division of Water Quality BASINWIDE ASSESSMENT REPORT – PASQUOTANK RIVER BASIN – APRIL 2006 1
Table 1. Pasquotank River basin facilities required to conduct whole effluent toxicity testing Subbasin/Facility 03-01-50 Camden Co. WTP Elizabeth City WWTP South Mills WTP 03-01-51 Manteo WWTP Skyco WTP 03-01-52 Bethel WTP Winfall WTP Pasqoutank Co. WTP 03-01-53 Columbia WTP Creswell WTP Roper WTP Bull Bay WTP Tyrrell County WTP Washington Co. WTP 03-01-54 Southern Outer Banks WTP Mainland WTP 03-01-55 Cape Hatteras WTP Rodanthe/Waves/Salvo WTP Stumpy Point WTP 03-01-56 Dare County WTP/002
Facility # on Table 1
NPDES Permit No.
Receiving Stream
7 2 16
NC0086681 NC0025011 NC0007978
Pasquotank R.
3 10
County Camden
Pasquotank R.
Pasquotank
Dismal Swamp Canal
Camden
NC0079057 NC0035670
Shallowbag Bay
Dare
UT Croatan Sound
Dare
14 15 20
NC0068861 NC0051373 NC0088480
Bethel Cr.
Perquimans
UT Mill Cr.
Perquimans
Albemarle Sound
Pasqoutank
11 13 19 6 12 18
NC0007510 NC0027600 NC0031925 NC0086924 NC0087092 NC0087009
UT Scuppernong R.
Tyrrell
UT Scuppernong R.
Washington
9 17
UT Kendrick Cr.
Washington
Bull Bay
Tyrrell
UT Riders Cr.
Tyrrell
Albemarle Sound
Washington
NC0087670 NC0088650
Atlantic Ocean
Currituck
North River
Currituck
4 5 8
NC0085707 NC0083909 NC0086932
Pamlico Sound
Dare
Blackmar Gut
Dare
Stumpy Point Bay
Dare
1
NC0070157
UT Atlantic Ocean
Dare
NCDENR, Division of Water Quality BASINWIDE ASSESSMENT REPORT – PASQUOTANK RIVER BASIN – APRIL 2006 2
