Flood Zones: Topanga vs West Covina
How do flood zones rules compare between Topanga, CA and West Covina, CA?
West Covina has fewer restrictions than Topanga.
Topanga, CA
Los Angeles County
LA County Code Title 11, Chapter 11.60 establishes floodway regulations for unincorporated areas. Development within FEMA flood zones requires compliance with NFIP standards. The County Flood Zone Determination website maps all flood hazard areas.
View full Topanga rules →West Covina, CA
Los Angeles County
West Covina participates in the National Flood Insurance Program (NFIP) and regulates development in FEMA-designated flood zones. The City lies in the San Gabriel Valley with waterways including the San Gabriel River and its tributaries. LA County Measure W funds stormwater improvements.
View full West Covina rules →Key Facts Comparison
| Fact | Topanga | West Covina |
|---|---|---|
| Code | Title 11, Ch. 11.60 | - |
| Elevation Req. | 1 ft above BFE | - |
| NFIP Participant | Yes | - |
| Flood Lookup | pw.lacounty.gov/floodzone | - |
| Insurance | Required in SFHA | - |
| NFIP Status | - | Participating community |
| Waterways | - | San Gabriel River + tributaries |
| Measure W Tax | - | $0.025/sq ft impervious |
| Flood Maps | - | msc.fema.gov |
Highlighted rows indicate differences between cities.
Topanga FAQ
How do I check if my property is in a flood zone in LA County?
Use the LA County Public Works Flood Zone Determination website at pw.lacounty.gov/floodzone. Enter your address to see FEMA flood zones and county floodway maps.
Do I need flood insurance in unincorporated LA County?
If your property is in a FEMA Special Flood Hazard Area (Zone A, AE, etc.), flood insurance is required for federally backed mortgages. LA County's CRS participation may provide premium discounts.
West Covina FAQ
Is West Covina in a flood zone?
Most of the City is outside the 100-year floodplain, but areas near the San Gabriel River and its tributaries (Walnut Creek, San Jose Creek, Big Dalton Wash) may have Zone A or AE designations. Check msc.fema.gov for your property.
What is the Measure W parcel tax?
LA County Measure W (Safe Clean Water Program) charges 2.5 cents per square foot of impermeable area on all parcels within the LA County Flood Control District to fund local water supply and stormwater quality improvements.
Compare other topics
See how Topanga and West Covina compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool