South Coast AQMD Rule 1148.2 Well Stimulation notifications mapping project
The South Coast Air Quality Management District (SCAQMD) has implemented noticing and reporting requirements for oil and gas wells within its district. This is called rule 1148.2 and it requires oil operators to submit specific reports of well activity related to well stimulation and drilling. The type of well stimulations reported include Hydraulic Fracturing (fracking), Acidizing (acid-fracking) and gravel packing (smaller-scale fracking). Along with these reports, chemical notification is also required.

This is a Southern Califonia only rule and this information isn’t collected anywhere else in California. Below are interactive mappings of all oil well stimulation reports for the initial 12 months of reporting: June 2nd, 2013 and July 15, 2014. Click on the icons to get more details and a link back to the AQMD data. The AQMD notification database is searchable and for public view, only works under Internet Explorer. The AQMD portal contains both Event Notifications and Chemical Reports and is available at AQMD is the air pollution control agency for all of Orange County and the urban portions of Los Angeles, Riverside and San Bernardino counties.
(map may take time to load as unfortunately there are quite a few data points)


Map broken down by Los Angeles City Councilmember districts.
Map broken down by Los Angeles County Supervisor districts.
Map broken down by CA Assembly districts.
Map broken down by CA Senate districts.

Fracktracker has recently created a similar map that includes the SCAQMD data tagged with conventional wells.


Hydraulic Fracturing activity predominately occurs in 2 areas. Offshore Long Beach/Seal Beach and the rest between Chino Hills and Brea.
HYDRAULIC FRACTURING is a technique used in stimulating a formation or zone that involves the pressurized injection of hydraulic fracturing fluid, which is a carrier fluid mixed with chemical additives, and typically a proppant, into an underground geologic formation in order to fracture the formation, thereby causing or enhancing the production of oil or gas from a well. There is no statewide moratorium on Hydraulic Fracturing, nor are any studies or impact reports required. is the Oil and Gas industry’s “voluntary” database, but of these fracked wells, only 1 is listed in its database. The Fracfocus database lists over 1000 fracked wells, this data suggests that the self-reported count is unreliable and may be under-reported up to a factor of 17:1.


There have been at least 264 active occurrences of acidizing . ACIDIZING can be used to clean out scale, damage, or other debris near proximal to the wellbore but it also describes different well stimulation treatments:

  1. Matrix Acidizing is performed at less than fracturing pressures, predominately with a mixture of Hydrochloric Acid (HC1), Hydroflouric Acid(HF) or Acetic Acid, to “eat” away existing fractures in sandstone or carbonite thereby creating “wormholes” , or
  2. Fracturing Acidizing which uses Hydoflouric Acid (HF) up to 28% strength as a fracturing agent injected at fracturing pressures against the reservoir formation just as another variant of Hydraulic Fracturing. The acid react with the soluble substances in the fractured formation to improve permeability and enhance production of oil and gas. The distance of an acid frack is only limited by the volume of acid and water used.

See the Next Generation “Distracted by Fracking” article.



There have been at least 92 instances of Gravel Packing. GRAVEL PACKING is a method that uses water and additives to place sand and gravel near the well bore itself with the objective of limiting entry of formation sands and fine-grained material into the wellbore. Ostensibly it is a well completion activity but it is performed at high volume and fracturing pressures which makes it a well stimulation activity. High Volume Gravel packing can create formation fracturing to a diameter of 500ft.


Who is doing what

Rule 1148.2 (d) requires operators to electronically notify the SCAQMD no more than 10 days and no later than 24 hours prior to the start of drilling, well completion, or rework of an onshore oil or gas well. Well operators are required to provide general well information, notification type, description of well activities, and nearest sensitive receptor information. These event notifications are made available for review as required under Rule 1148.2 (d)(4).

Rule 1148.2 will be in effect for 2 years beginning June 4, 2013 until June 4, 2015.

Link to South Coast AQMD Rule 1148.2.

You may freely link, embed or reproduce these maps on your website or blog. Below is the inline code for All Well Stimulations, ask for others:

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