2026 Rankings

Most Gas Incidents: California Counties — 2026 Rankings

Last updated: June 4, 2026

51 ZIP codes ranked by Gas Risk

Out of 51 counties with PHMSA gas distribution data, these are the counties with the highest incident risk.

Statistic Value
Counties ranked 51
Total incidents (top 100) 492
Total fatalities (top 100) 25

Top 51 Counties

Rank County State Incidents Fatalities Latest Year Risk Score
1 Inyo California 49 4 2023 15/100
2 Kern California 49 4 2023 15/100
3 Los Angeles California 49 4 2023 11/100
4 Butte California 49 4 2023 11/100
5 San Joaquin California 49 4 2023 11/100
6 Santa Clara California 23 0 2023 10/100
7 Madera California 19 1 2020 10/100
8 Orange California 15 0 2025 5/100
9 Lassen California 15 0 2025 5/100
10 Lake California 15 0 2025 5/100
11 San Diego California 13 0 2020 4/100
12 Alameda California 11 1 2025 16/100
13 San Bernardino California 10 0 2025 15/100
14 Riverside California 10 0 2025 15/100
15 Contra Costa California 10 0 2023 8/100
16 Tulare California 6 0 2020 3/100
17 Fresno California 6 0 2017 3/100
18 Monterey California 6 0 2021 3/100
19 San Francisco California 6 0 2019 3/100
20 Stanislaus California 6 0 2012 3/100
21 Merced California 5 2 2016 11/100
22 Shasta California 5 0 2018 6/100
23 Sacramento California 4 0 2018 8/100
24 Ventura California 4 0 2024 6/100
25 Napa California 4 0 2016 3/100
26 Glenn California 4 0 2018 3/100
27 San Mateo California 4 0 2018 2/100
28 Placer California 4 0 2018 2/100
29 El Dorado California 4 0 2019 2/100
30 Nevada California 4 0 2018 2/100
31 Sonoma California 3 0 2017 16/100
32 San Luis Obispo California 3 0 2020 2/100
33 Santa Barbara California 3 0 2018 1/100
34 Mono California 2 0 2023 7/100
35 Tehama California 2 1 2010 6/100
36 Kings California 2 0 2011 3/100
37 Santa Cruz California 2 0 2024 3/100
38 Mendocino California 2 0 2024 3/100
39 Sutter California 2 0 2004 2/100
40 Marin California 2 0 2018 1/100
41 Humboldt California 2 0 2010 1/100
42 Yolo California 2 0 2004 1/100
43 Imperial California 1 0 2006 15/100
44 Solano California 1 0 2017 5/100
45 Colusa California 1 0 2008 3/100
46 Alpine California 1 0 2018 2/100
47 Yuba California 1 0 2017 2/100
48 Siskiyou California 1 0 2018 1/100
49 Plumas California 1 0 2018 0/100
50 Amador California 0 0 7/100
51 Del Norte California 0 0 1/100

Methodology

County rankings for California based on total PHMSA gas distribution incidents reported since 2004.

Data source: U.S. DOT Pipeline and Hazardous Materials Safety Administration (PHMSA), Gas Distribution System Incident Reports 2004-2026. Last updated: 2026-06-04.

Frequently Asked Questions

What is a gas distribution incident?

Gas distribution incidents involve failures in the local natural gas pipeline network — leaks, ruptures, explosions, and equipment failures that can cause property damage, injuries, and fatalities. PHMSA requires all operators to report significant incidents.

How can I protect my home?

Install CO detectors on every level (CPSC recommendation). Have gas appliances inspected annually. Know the signs of a gas leak: rotten egg smell, hissing near gas lines, dead vegetation near pipelines. If you suspect a leak, leave immediately and call 911.

Explore More

How this ranking is calculated, data sources, and limitations: Rankings Methodology →


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Disclaimer: Rankings are based on EPA, FEMA, and federal agency data. They reflect historical patterns and risk indicators, not necessarily current conditions. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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