General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website S660137 Century Communities Privately-Owned Business 4695 MacArthur Court Suite 300 Newport Beach, CA 92660 null null Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date S934368 Emerald Ridge Riverside 8 Facility Discharger 08/07/2025 null S930674 Rustic Meadows Riverside 9 Facility Discharger 04/25/2025 null S928286 Heritage at the Preserve San Bernardino 8 Facility Discharger 01/27/2025 null S927703 Gierson Ranch Riverside 9 Facility Discharger 01/05/2025 null S926244 Tr 38913 Sagecrest Riverside 8 Facility Discharger 10/28/2024 null S923812 Brookhaven Los Angeles 4 Facility Discharger 07/25/2024 null S921155 Highland 46 San Bernardino 8 Facility Discharger 04/14/2024 null S919011 Jackson Street Riverside 8 Facility Discharger 01/19/2024 null S911260 Rose Glen San Bernardino 8 Facility Discharger 03/06/2023 null S908445 Paradise Knolls Tract 38258 Riverside 8 Facility Discharger 10/24/2022 null S908437 Paradise Knolls Trac 38257 Riverside 8 Facility Discharger 10/24/2022 null S907009 Covina 38 Los Angeles 4 Facility Discharger 08/25/2022 null S902862 Mclaughlin Villages Riverside 8 Facility Discharger 03/10/2022 null S902066 Gateway Homes & Gateway Townhomes Los Angeles 4 Facility Discharger 02/10/2022 null S901204 The Depot San Bernardino 8 Facility Discharger 12/22/2021 null S899742 Mountain Bridge Riverside 8 Facility Discharger 11/05/2021 null S898262 Vista Hannalei San Diego 9 Facility Discharger 09/16/2021 null S897610 Stonebrook Meadows San Bernardino 8 Facility Discharger 08/25/2021 null S897514 Greenway San Bernardino 8 Facility Discharger 08/24/2021 null S896946 Emerald Ridge South Riverside 8 Facility Discharger 08/06/2021 null S893988 Ashland Springs Riverside 8 Facility Discharger 05/19/2021 null S890129 Ferree Street Project San Bernardino 8 Facility Discharger 01/27/2021 null S885348 Tract 82469 Los Angeles 4 Facility Discharger 08/27/2020 null S880930 TRACT 32704 Riverside 8 Facility Discharger 03/27/2020 null S879203 Mesa Verde Riverside 8 Facility Discharger 02/04/2020 null S878006 Tract 20217 San Bernardino 8 Facility Discharger 12/19/2019 null Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification N/A Mark Piercy Contact Owner Contact null null null Regulatory Measures(non-enforcement) Reg. Measure ID Regulatory Measure Type Region WDID Title Status Program Order No. RM Effective Date RM Termination Date Relationship Relationship Start Date Relationship End Date S588454 Construction 8 8 33C408658 Notice Of Intent New Application Active CONSTW 2009-0009-DWQ 08/27/2025 null Discharger 08/07/2025 null S575632 Construction 4 4 19C404550 Notice Of Intent New Application Active CONSTW 2009-0009-DWQ 07/30/2024 null Discharger 07/25/2024 null S572392 Construction 8 8 36C403613 Notice Of Intent New Application Active CONSTW 2009-0009-DWQ 04/16/2024 null Discharger 04/14/2024 null S569670 Construction 8 8 33C403034 Notice Of Intent New Application Active CONSTW 2009-0009-DWQ 02/06/2024 null Discharger 01/19/2024 null S578689 Construction 8 8 33C405469 Notice Of Intent New Application Active CONSTW 2009-0009-DWQ 11/04/2024 null Discharger 10/28/2024 null S581174 Construction 8 8 36C406096 Notice Of Intent New Application Active CONSTW 2009-0009-DWQ 01/29/2025 null Discharger 01/27/2025 null S580451 Construction 9 9 33C406076 Notice Of Intent New Application Active CONSTW 2009-0009-DWQ 01/28/2025 null Discharger 01/05/2025 null S584040 Construction 9 9 33C406898 Notice Of Intent New Application Active CONSTW 2009-0009-DWQ 04/29/2025 null Discharger 04/25/2025 null Violations within the past calendar year 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. S897131 09/02/2025 SW - Failure to Obtain Permit Failure to obtain coverage under the 2022 CGP by 09/01/2025. Violation N Internal Report Rose Glen S559212 2009-0009-DWQ Y S896346 09/02/2025 SW - Failure to Obtain Permit Failure to obtain coverage under the 2022 CGP by 09/01/2025. Violation N Internal Report Paradise Knolls Tract 38258 S555249 2009-0009-DWQ Y S896345 09/02/2025 SW - Failure to Obtain Permit Failure to obtain coverage under the 2022 CGP by 09/01/2025. Violation N Internal Report Paradise Knolls Trac 38257 S555246 2009-0009-DWQ Y S896193 09/02/2025 SW - Failure to Obtain Permit Failure to obtain coverage under the 2022 CGP by 09/01/2025. Violation N Internal Report Mclaughlin Villages S547651 2009-0009-DWQ Y S895091 09/02/2025 SW - Failure to Obtain Permit Failure to obtain coverage under the 2022 CGP by 09/01/2025. Violation N Internal Report Gateway Homes & Gateway Townhomes S546631 2009-0009-DWQ Y S896104 09/02/2025 SW - Failure to Obtain Permit Failure to obtain coverage under the 2022 CGP by 09/01/2025. Violation N Internal Report Mountain Bridge S543509 2009-0009-DWQ Y Enforcement Actions Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status S461194 Notice of Violation null 8 33C399819 CONSTW 09/05/2025 Active S461042 Notice of Violation null 8 33C396849 CONSTW 09/05/2025 Active S461980 Notice of Violation null 8 36C400405 CONSTW 09/05/2025 Active S461195 Notice of Violation null 8 33C399818 CONSTW 09/05/2025 Active S448148 1st Annual Report Notice of Non-Compliance null 8 33C395770 CONSTW 09/19/2022 Historical S448149 2nd Annual Report Notice of Non-Compliance null 8 33C395770 CONSTW 10/20/2022 Historical S460953 Notice of Violation null 8 33C395770 CONSTW 09/05/2025 Active S459940 Notice of Violation null 4 19C396601 CONSTW 09/05/2025 Active Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status