McNutt_WQC_2020IR_May2021_Info_Item

Department of Environmental Quality
2020 Integrated Report and 303(d) List
WQC, May 12, 2021
Cam McNutt,DWR Modeling and Assessment Branch
Purpose
Review results of the 2020 NC water
quality assessment and resulting
Integrated Report and 303(d) List
2
2020 Integrated Report Schedule
•Summer 2020 compile data
•Fall 2020 complete draft assessment-Internal review
•Spring 2021 60-day public review
•March 2021 Start 2022 Integrated Report
•April 2021 Finalize assessments and
•April 2021 Response to Comments
•May 12, 2021 Info item to WQC
•May 13, 2021 Submit 303(d) List and Integrated Report to EPA
2020 Data Compilation
DWR Benthos-3,000 Stations
DWR Fish Community-940
DWR Fish Tissue-580
DWR Reservoir/Lakes-400
DWR Physical/Chemical-400
DMF Recreational-200
DWR RAMS-30
Discharger Coalitions-230
Charlotte Mecklenburg Stormwater-20
American Rivers (dams) 9
Over 1,000,000 observations used for assessment
4
Draft Assessment Results by Category
5
1
2
3
4
5
305(b) Report
EC
MC
DI
Meeting Criteria
Data Inconclusive
Exceeds Criteria
(“impaired”)
11,706
1,933
524
1,364 1,200 Assessment Units (waterbodies)
Delistings 56
New Listings 70
Assessments
Draft Assessment Unit Ratings
6
N=13,495 Active AUs N=3,727 Monitored AUs
RED= at least ONE Category 5 Assessment
PINK= at least ONE Category 4 Assessment (no category 5)
GRAY= at least ONE Category 3 Assessment (no category 4 or 5)
BLUE= only Category 1 Assessments
1,6701,211
6811659,768
GREEN= No Data to make Assessments
Public Comment
60 day public comment period –ended April 2, 2021
Public Comment Materials Included:
•Draft 2020 303(d) List
•2020 303(d) Listing and Delisting Methodology
•Draft 2020 Integrated Report
•Integrated Report Category Assignment Procedure
•Raw Data
•Online Map
•Fact Sheets –upon request
7
Comments Received 2020
1.City of Charlotte and Mecklenburg County
2.City of Durham
3.Lower Neuse Basin Association and Neuse River Compliance
Association
4.North Carolina Farm Bureau Federation
5.Southern Environmental Law Center
6.Upper Neuse River Basin Association
8
Public Review Summary
Comment areas:
Listing and Delisting Methods
Waterbody Specific Comments
Assessment Unit Delineation
Pathogens Listing and Delisting
Water Temperature in Trout Classified Waters
Third Party Data Submittal and usage
9
Prioritizing Waters for Restoration
•Starting in 2016 DWR committed to develop restoration or protection plans for 49 303(d) waters and 9 non-303d waters by 2022.
•24 plans are in progress and 21 are completed. 13 to start next year.
•DWR is also developing Clean Water Act commitments/priorities for the 2022 to 2032
•DWR has developed several tools/workflows to assist in plan development with active stakeholder participation.
•More on this process in a Fall 2021 Information Item
10
Department of Environmental Quality
Thank You
Contact Information:
Cam McNutt
[e-mail]
12
EC 1
Listing on
2016 303(d)?
>1 excursions in
new data years
>3 excursions in
NDYs with >90%
confidence in
exceedance rate
>10.01% Above
Evaluation
Level
>90% Confidence
for Exceedance
Rate
N>9 >2 Excursions
in Current AP
Augmented
data to 2007
N>9 EC 3
DI 1
EC 2
DI 4
DI 2
Listing on
2016 303(d)?
Data not to
augment
>10%>90%
2 of 5
2 of 4
2 of 3
2 of 2
1 of 1Data to augment
>10%>90%
3 of 9
3 of 8
3 of 7
3 of 6
DI 3 EC 4
EC1 >10%>90% N>9 most common EC assessment
EC2 >10%>90% N<9 waterbody is already EC so at some point had N>10 therefore it will
remain EC. EC not removed due to lack of current data this could include waters with no
current data but need to continue to be EC.
EC3 >10%<90% N=NA waterbody is already EC so at some point had N>10. However
confidence is now <90% so must have 2 or more excursions in current AP to remain EC.
EC4 >10%<90% N=NA With 4 or more excursions and N<10 confidence is > 90 this
scenario goes down the other path. These will be 14-17% excursion rate
EC5 waterbody is already EC so at some point had N>10. However confidence is now
<40% so must have 3 or more excursions in current AP to remain EC.
First Pass
Assessment
21 24
23
5
13
182
47160
EC 6 5
13
>70% Confidence
in Meeting Criteria
MC 1
Listing on 2016
303(d)?
EC 5
<40% Confidence
in Meeting Criteria
<40% Confidence
in Meeting Criteria
>2 excursions in
new data years
>2 excursions in
new data years
DI 5
>10% Above
Evaluation Level
90% Confidence for
Exceedance Rate
LEGEND
MC
EC
DI
Meets criteria
Data Inconclusive
Exceeds criteria
Yes
No
MC 2
DI 7
DI 6
DI 8
First Pass
Assessment
9
3
3,368
1,234636
46
9
Confidence and Error Rate
14