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AB 1102

Sea level rise and groundwater rise: contaminated sites: report.

2025-2026 Regular Session Introduced by Tasha Boerner

Requires risk assessments for new developments within 1,000 feet of contaminated sites vulnerable to sea level or groundwater rise, for informational purposes.

In committee: Held under submission.
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Bill Summary · AB 1102

AB 1102 — Summary (Boerner)

Title: Sea level rise and groundwater rise: contaminated sites: report
Status: In committee; held under submission (last action: 2025-05-23)
Introduced: February 20, 2025

Purpose / Intent

AB 1102 directs state agencies to identify contaminated sites vulnerable to rising seas and groundwater and requires developers proposing projects near those sites to provide an informational risk assessment about sea level rise (SLR) and groundwater rise (GWR) as part of permit or development applications. The goal is to increase awareness of contamination migration risks associated with coastal and groundwater hazards and to inform planning and permitting decisions.

Key provisions

  • Adds Health and Safety Code §57014:

    • Requires the Department of Toxic Substances Control (DTSC) and the State Water Resources Control Board (SWRCB) to submit a report to the Legislature on or before January 1, 2027.
    • The report must list all contaminated sites that are vulnerable to sea level rise and groundwater rise and state when each site's vulnerability assessment will be or has been completed.
    • Report submission must comply with Government Code §9795.
    • This reporting provision is repealed January 1, 2031.

  • Adds Government Code §65940.4:

    • Requires a proponent of a new development to complete a sea level rise and groundwater rise risk assessment as part of the application to a public agency if:
    • The proposed development is within 1,000 feet of a contaminated site identified by DTSC, SWRCB, or a local government; and
    • The proposed development is within an area vulnerable to groundwater rise or sea level rise.
    • Defines both “sea level rise” and “groundwater rise” as a 5-foot rise, as determined by NOAA, the Ocean Protection Council, USGS, University of California, or a local coastal hazards vulnerability assessment.
    • Specifies the risk assessment is for informational purposes only.

Who is affected

  • Developers/proponents of new developments within 1,000 feet of identified contaminated sites in areas vulnerable to SLR/GWR.
  • Local public agencies that accept and process development applications (additional application requirements).
  • DTSC and SWRCB (required to produce the vulnerability report).
  • Local governments that identify contaminated sites and conduct coastal vulnerability assessments.
  • Potentially communities near contaminated sites (improved disclosure/awareness).

Procedural / fiscal notes

  • Bill introduced Feb 20, 2025; referred to multiple Assembly committees; April 30, 2025: E.S.&T.M. committee recommended do pass (7–0) and re-referred to Appropriations. As of May 23, 2025 the bill is held under submission in Appropriations.
  • Fiscal: no direct appropriation. Classified as imposing a state‑mandated local program. However, the bill declares no state reimbursement is required because local agencies may levy fees or assessments to cover the costs (citing Art. XIII B, §6 and Gov. Code §17556).

Compiled from official sources — confirm details with the bill’s official record.

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