1. (a) The following active ingredients and/or their degradation products, including their salts and esters, detected pursuant to section 13149(a) of the Food and Agricultural Code and subject to section 13150(d)(2) of the Food and Agricultural Code:

   Atrazine

   Bentazon

   Bromacil

   Diuron, except for products with less than 7% diuron that are applied to foliage

   Norflurazon

   Prometon

   Simazine

2. (b) The following active ingredients and/or their degradation products, including their salts and esters, detected pursuant to section 13149(a) of the Food and Agricultural Code and subject to section 13150(d)(1) of the Food and Agricultural Code:

   Chlorthal-dimethyl

   Hexazinone

   Imidacloprid

   Metolachlor

   (S)-Metolachlor

3. (c) The following active ingredients and/or their degradation products, including their salts and esters, identified pursuant to section 13145(d) of the Food and Agricultural Code:

   Alkyl dimethyl benzyl ammonium chloride (ADBAC)

   Aminocyclopyrachlor

   Aminopyralid

   Bensulfuron methyl

   Benzobicyclon

   Benzovindiflupyr

   Chlorantraniliprole

   Chlorfenapyr

   Chloropicrin

   Chlorothalonil

   Chlorsulfuron

   Clopyralid

   Clothianidin

   Cyantraniliprole

   Cyclaniliprole

   2,4-Dichlorophenoxyacetic acid (2,4-D)

   2-(2,4-Dichlorophenoxy)-(R)-propanoic acid (2,4-DP-P)

   Diazinon

   Dicamba

   Dichlobenil

   Dichloran

   Didecyl dimethyl ammonium chloride

   1,3-Dichloropropene

   Dimethenamid-P

   Dinotefuran

   Diquat dibromide

   Dithiopyr

   Fenamidone

   Fipronil

   Flazasulfuron

   Fludioxonil

   Fluopicolide

   Fluopyram

   Flupyradifurone

   Flurprimidol

   Flutianil

   Flutolanil

   Flutriafol

   Foramsulfuron

   Forchlorfenuron

   Fosetyl-Al (aluminum tris)

   Fosthiazate

   Halosulfuron-methyl

   Hydrogen cyanamide

   Imazamox

   Imazapyr

   Imazethapyr

   Imazosulfuron

   Indaziflam

   Iodosulfuron-methyl-sodium

   Ipflufenoquin

   Iprodione

   Isoxaben

   Kasugamycin hydrochloride

   Kresoxim-methyl

   Mefenoxam

   Mepiquat chloride

   Mesosulfuron-methyl

   Mesotrione

   Metalaxyl

   Metaldehyde

   Metconazole

   Methomyl

   Methoxyfenozide

   Metribuzin

   Monosodium methanearsonate (MSMA)

   Myclobutanil

   Nicosulfuron

   Orthosulfamuron

   Oryzalin

   Paraquat dichloride

   Penflufen

   Penoxsulam

   Penthiopyrad

   Phorate

   Prometryn

   Propiconazole

   Propyzamide

   Pydiflumetofen

   Pyraclostrobin

   Pyrifluquinazon

   Pyrithiobac-sodium

   Pyroxasulfone

   Pyroxsulam

   Quinclorac

   Rimsulfuron

   Saflufenacil

   Sulfentrazone

   Sulfometuron-methyl

   Sulfosulfuron

   Tebuconazole

   Tebufenozide

   Tebuthiuron

   Tembotrione

   Terrazole

   Tetraconazole

   Tetraniliprole

   Thiamethoxam

   Thidiazuron

   Thiencarbazone-methyl

   Topramezone

   Triadimefon

   Triallate

   Tribenuron-methyl

   Trifloxysulfuron-sodium

   Triticonazole

   Uniconazole-P

Pesticides labeled for agricultural, outdoor institutional or outdoor industrial use that contain any of the following active ingredients and/or their degradation products, including their salts and esters, are designated as having the potential to pollute groundwater:

Note: Authority cited: Sections 11456 and 13145, Food and Agricultural Code. Reference: Sections 13144, 13145, 13149 and 13150, Food and Agricultural Code.

History

1. New section filed 1-4-89; operative 1-4-89 pursuant to Government Code section 11346.2(d) (Register 89, No. 5).

2. Amendment of subsections (a) and (b) filed 4-10-90; operative 4-10-90 pursuant to Government Code section 11346.2 (d) (Register 90, No. 16).

3. New subsection (a)(6) filed 12-12-91; operative 1-13-92 (Register 92, No. 13).

4. Amendment of subsection (b) filed 4-3-92; operative 5-4-92 (Register 92, No. 18).

5. Amendment of subchapter 1 heading and amendment of section and Note filed 4-13-99; operative 5-13-99 (Register 99, No. 16).

6. Amendment filed 2-21-2001; operative 3-23-2001 (Register 2001, No. 8).

7. Amendment of subsection (a) and Note filed 4-27-2004; operative 5-27-2004 (Register 2004, No. 18).

8. Amendment of subsection (b) filed 5-13-2009; operative 6-12-2009 (Register 2009, No. 20).

9. Change without regulatory effect redesignating and amending portion of subsection (b) as new subsection (b)(1) and adding subsection (b)(2) filed 8-22-2012 pursuant to section 100, title 1, California Code of Regulations (Register 2012, No. 34).

10. Amendment filed 8-25-2014; operative 10-1-2014 (Register 2014, No. 35).

11. Change without regulatory effect amending subchapter 1 heading, first paragraph and subsection (a) filed 5-15-2023 pursuant to section 100, title 1, California Code of Regulations (Register 2023, No. 20).

12. Amendment of section and Note filed 5-13-2026; operative 7-1-2026 (Register 2026, No. 20).