California Integrated Water Quality System (CIWQS 100.0) - Build Number: mainTrunk.mm.dd.yyyy.1


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	California Integrated Water Quality System Project (CIWQS)

Party At-A-Glance Report

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General Information
Party ID	Party Name	Party Classification	Mailing Address	Work Phone	Email/Website
S36063	Porter Ranch Development	Other	11280 Corbin Ave Northridge, CA 91326	None	None

Related Places

Place ID	Place Name	County	Region	Place Type	Relationship to Party	Relationship Start Date	Relationship End Date
S260118	Porter Ranch Development	Los Angeles	4	Facility	Discharger	09/01/2005	None
S934413	Porter Ranch Tract 50506	Los Angeles	4	Facility	Discharger	08/07/2025	None

Total Related Places: 2

Related Parties

Party ID	Party Name	Party Type	Role/Relationship	Relationship Start Date	Relationship End Date	Classification
N/A	Michael Villani	Contact	Owner Contact	N/A	N/A	N/A
N/A	Peter Kim	Contact	Owner Contact	N/A	N/A	N/A

Total Related Parties: 2

Regulatory Measures (non-enforcement)

Reg. Measure ID

Regulatory Measure Type

Relationship Start Date

Relationship End Date

Amended?

S588509

Construction

4 19C408635

Active

CONSTW

2009-0009-DWQ

08/27/2025

None

Discharger

08/07/2025

None

Total Regulatory Measures: 1

Violations within the past five years

Violation ID	Occurrence Date	Violation Type	Violation Description(+)	Violation Status	Priority	Source	Facility Name	Violated Reg. Meas. ID	Violated Reg. Meas. Order No.	Linked to Enf.
S893574	09/02/2025	SW - Failure to Obtain Permit	Failure to obtain coverage under the 2022 CGP by 09/01/2025.	Violation	N	Internal Report	Porter Ranch Development	S186618	2009-0009-DWQ	Y
S884616	02/24/2023	SW - Deficient BMP Implementation	BMP and sediment discharge violations observed.	Violation	N	Inspection	Porter Ranch Development	S186618	2009-0009-DWQ	Y
S889024	04/05/2024	SW - Deficient BMP Implementation	Insufficient perimeter control BMPs with potential discharge	Violation	N	Inspection	Porter Ranch Development	S186618	2009-0009-DWQ	Y
S885633	08/03/2023	SW - Deficient BMP Implementation	? Poor housekeeping was observed throughout the site. ? The discharger failed to	Violation	N	Inspection	Porter Ranch Development	S186618	2009-0009-DWQ	Y
Report currently showing last five years of violations. Click here to return to viewing one year of violations. Refer to the Interactive Violation Report for more data.

Total Violations: 4

*Click the "(+/-) Violation Description" link to expand and contract the violation description.

Enforcement Actions

Enforcement ID	Enforcement Type	Enf. Order No.	Title	Program	Effective Date	Status
S458423	Notice of Violation	None	4 19C300579	CONSTW	09/05/2025	Active
S425540	Notice of Violation	None	4 19C300579	CONSTW	02/03/2017	Historical
S454042	Notice of Violation	None	4 19C300579	CONSTW	08/08/2024	Active
S450405	Notice of Violation	None	4 19C300579	CONSTW	08/03/2023	Historical
S449543	Notice of Violation	None	4 19C300579	CONSTW	05/19/2023	Historical
S426185	Notice of Violation	None	4 19C300579	CONSTW	05/12/2017	Historical

Total Enforcement Actions: 6

Regulatory Measures linked to Related Parties

Reg. Measure ID

Organization

Regulatory Measure Type

Program

Effective Date

Status

Total Regulatory Measures linked to Related Parties: 0

The current report was generated with data as of: 10/15/2025
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.

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