Built from public records. No company paid to be listed. Every check names its source and the date it was read.
Public records

Septic companies in Monrovia, CA

Two septic companies on record in Monrovia, Los Angeles County. About 99% of mapped ground here is rated Very limited for septic drain fields, with depth to bedrock the limiting feature.

What the ground in Monrovia is like

The USDA soil survey rates mapped ground in Monrovia for septic drain-field suitability across roughly 14 square miles. About 99% of the rated ground is classed "Very limited", the survey records severe restrictions for a conventional drain field across most of that ground.

In Monrovia, the leading limit is depth to bedrock: rock sits close enough to the surface that there is not enough soil column above it for a conventional field to sit in. Effluent needs that depth to disperse; when bedrock comes up, the workable layer runs out. The survey flags that limit on about 63% of the rated ground here.

The limiting features the survey records most often here:

  • Depth to bedrock63.3%
  • Slope63.3%
  • Seepage, bottom layer39.0%
  • Flooding27.1%

This is survey data for mapped areas, not a substitute for a site evaluation on your own lot. Conditions on a single parcel can differ from the map.

USDA NRCS SSURGO, ENG Septic Tank Absorption Fields · 99.2% Very limited · Depth to bedrock · 20 map units · 13.63 sq mi · read 2026-08-30

The two companies

Nearby

All septic companies in California · Los Angeles County