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MDE Flocculants

Chemical Additive Forms and Guidance

Standards for Use of Treatment Chemicals for Sediment Control
Request for Cationic Chemical Additives Form
Procedures for Review of Chemical Additives for Sediment Control
Video Guidance: Example of Polyacrylamide (PAM) Use with Wattles - external link, courtesy of NCSU Crop and Soil Sciences Department

Authorization for use of chemical additives as part of an NPDES permit or NPDES general permit registration is required prior to use, including the use of additives on the approved list below.

Manufacturer-Distributor	Product-Name	Max-Concentration	Type-of-Polymer	Limitation	Date of Approval	Approval Letter

Applied Polymer Systems (APS)	APS 702b Silt Stop	42 mg/L	Anionic		8/21/2019

Applied Polymer Systems (APS)	APS 702c Silt Stop	42 mg/L	Anionic		8/21/2019

Applied Polymer Systems (APS)	APS 703d Silt Stop	38.3 mg/L	Anionic		8/21/2019

Applied Polymer Systems (APS)	APS 703d#3 Silt Stop	51.8 mg/L	Anionic		8/21/2019

Applied Polymer Systems (APS)	APS 705 Silt Stop	27.7 mg/L	Anionic		8/21/2019

Applied Polymer Systems (APS)	APS 706b Silt Stop	42 mg/L	Anionic		8/21/2019

Applied Polymer Systems (APS)	APS 707a Silt Stop	8.96 mg/L	Anionic		7/27/2022

Applied Polymer Systems (APS)	APS 708x Silt Stop	32.08 mg/L	Anionic		7/27/2022

Applied Polymer Systems (APS)	APS 710 Silt Stop	128.34 mg/L	Anionic		3/4/2024	APS 710 Letter

Applied Polymer Systems (APS)	APS 730b Silt Stop	5.6 mg/L	Anionic		8/21/2019

Applied Polymer Systems (APS)	APS 740 Silt Stop	5.2 mg/L	Anionic		8/21/2019

Applied Polymer Systems (APS)	APS702AA Silt Stop	6.98 mg/L	Anionic		8/21/2019

Applied Polymer Systems (APS)	APS712 Silt Stop	61.75 mg/L	Anionic		11/6/2020

Applied Polymer Systems (APS)	Pond Clear Plus	36.54 mg/L	Anionic		7/17/2024

Biostar, Inc.	2% Chitosan Acetate	169.86 mg/L	Cationic		4/9/2025	Chitosan Acetate Letter

Biostar, Inc.	BDX-305	22.60 mg/L	Anionic		4/9/2025	BDX-305 Letter

Biostar, Inc.	Bridger 755 (also called Biostar-AP)	13.91 mg/L	Anionic		4/9/2025	Bridger 755 Letter

Biostar, Inc.	Chitosan Lactate	203.00 mg/L	Cationic		4/9/2025	Chitosan Lactate Letter

Carolina Hydrologic, LLC	H30 PAM - granular	0.18 mg/L	Anionic		7/15/2022

Carolina Hydrologic, LLC	HydroLoc Floc Flat 5#, Floc Roll 2.5#, & Floc Line 2.5#	1.18 mg/L	Anionic		7/27/2022

Clear Creek Systems, Inc.	FlocClear (2% chitosan acetate)	26.75 mg/L	Cationic	Requires Monitoring	1/31/2025	FlocClear Letter

Dober	Haloklear BHR - P50	78.4 mg/L	Cationic	Requires Monitoring	9/18/2024	BHR-P50 Letter

Dober	HaloKlear LBP 2101	152.75 mg/L	Anionic		4/20/2021

Dober	HaloKlear Liquifloc 2%	4.37 mg/L	Cationic	Requires Monitoring	8/27/2024

Dober	LBP-2101 and LiquiFloc 2% Dual Polymer System	34.25 mg/L	Anionic / Cationic	Monitoring Required	8/28/2024	Dober Dual Polymer Letter

Neo Solutions Inc.	NS 6850P	7.69 mg/L	Anionic		5/6/2025	NS 6850P Letter

SePro	EutroSORB WC	2.05 mg/L	Anionic		2/15/2024	EutroSORB WC Letter

Tidal Vision, USA	Tidal Clear 1%	16.26 mg/L	Cationic	Monitoring Required	7/27/2022

Tidal Vision, USA	Tidal Clear Hybrid	3.69 mg/L	Cationic	Monitoring Required	7/27/2022

Date Updated: 3/8/2025

MDE Flocculants

​​​​​​​​​​​​​​​​​​​Chemical Additive Forms and Guidance​​​

Chemical Additive Forms and Guidance