north carolina surface water analysis · 2018-04-04 · north carolina surface water analysis julia...

Department of Environmental Quality

North Carolina Surface Water AnalysisJulia Cavalier, P.E.

Public Water Supply Section

Department of Environmental Quality

Surface water reporting• Raw, settled CFE turbidity• Raw coliform• Alkalinity, pH• Chemicals fed• Daily plant flow

2

Statewide surface water data

3

Number of plants per basin

4

Basin name Number of plants

Catawba 20

Cape Fear 27

French Broad 13

Neuse 14

Yadkin 36

2016 average raw water turbidity

5

254

2016 annual average raw water turbidity

6

2016 average coagulant dose

7

Department of Environmental Quality

8

More about Cape Fear Basin Plants

Department of Environmental Quality

Cape Fear BasinWater system Plant name Source description Coagulant category

Fayetteville PWC Hoffer Run of river Ferric

Fayetteville PWC Glenville Run of river Ferric

Dunn A B Uzzell Run of river Alum + poly

Harnett County Harnett County Reservoir Alum + poly

Bladen Bluffs Bladen Bluffs Run of river Alum + poly

Brunswick County Northwest Run of river PaCl + poly

Cape Fear PUA Sweeney Run of river Alum + poly

Pender County Pender County Run of river Ferric

9

Cape Fear basin turbidity

10

Cape Fear basin coagulant dose

11

Feb 2016 Cape Fear Plants

Feb 2016 Lower Cape Fear Intakes

Coagulant dose

14

Raw Water pH

15

Raw water alkalinity

16

Department of Environmental Quality

Further research• Inter and intra basin comparisons of turbidity trends• Relationship between coagulant dose and raw water alkalinity

and pH. Any differences between coagulant strategy?• Integrate TOC into data analysis

• TOC monthly, vs daily• Smaller scale analysis – a few plants

• Time series analysis

17

Department of Environmental Quality

Questions?• Julia Cavalier

• julia.cavalier@ncdenr.gov• (919) 707-9067

18