Humboldt County property record for 508 Mad River Rd, Arcata, CA 95521
| Property Type | Rural Home |
|---|---|
| Details | 3 bd · 1 ba · 1,440 sqft · built 1914 |
| Lot Size | 31 acres (1,353,844 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $5,611 (2025) |
| Flood Zone | Zone A (high risk) |
| APN | 506-341-003-000 |
| Primary APN | 506-341-003-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,440 sqft Living Area |
| Year Built | Built 1914 |
|---|---|
| Effective Year Built | Effective 1954 |
| Construction Type | Wood |
| Lot Area | 1,353,844 sqft (31 acres) |
| Old Parcel Number | 50634103 |
|---|---|
| Street Address | 508 MAD RIVER RD |
| City | ARCATA |
| State | CA |
| Zip | 95521-9544 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Rural Home |
| Local Zoning Code | AE60/F |
| Legal Description | /S7T6NR1E1W/0600610002D050283C 0283C 00083X 620007B C |
| Legal Range | 01E |
| Legal Township | 06N |
| Legal Section | 07 |
| Jurisdiction | HUMBOLDT CA |
| Township / Civil Division | ARCATA |
| Census Block Group | 1 |
| Census Block | 1019 |
| Census Tract | 1300 |
Source: Humboldt County records, as of October 13, 2025
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 580 MAD RIVER RD, ARCATA, CA 95521-9544 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Prior Sale | Oct 9, 2007 |
| Last Transfer Date | Jan 14, 2016 |
| Transfer Doc | 0000001329 |
| Record Updated | Jun 8, 2026 |
Source: Humboldt County assessment roll, as of July 1, 2025
| Type | Name |
|---|---|
| State | California |
| County | Humboldt County |
| Secondary School District | Northern Humboldt Union High School District (09 - 12) |
| Elementary School District | Pacific Union Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $5,611.00 (+2.52%) | $503,108 (+4.04%) Land $355,136 Building $147,972 |
| 2023 | $5,473.00 (+0.53%) | $483,574 Land $341,347 Building $142,227 |
| 2022 | $5,444.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective August 25, 2022 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone A high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Not determined for this zone |
| Flood Insurance Requirement | Required federally backed loans |
| Nearby Flood Policies | 6 in force |
| Nearby Flood Claims | 22 (1982–2019) |
| Claims Outside the SFHA | 1 of 22 |
| Most Recent Claim | Feb 2019 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 93% of the US · lower than 96% of California |
|---|---|
| Wildfire Likelihood | 0.03% annual chance |
| Exposure | Direct burnable vegetation |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | HUMBOLDT BAY MWD private · serves 680 people · EPA ID CA1210013 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jul 2025 |
| Lead | 2 ppb (2021–2023) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 7 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Starlink Satellite | 280 / 30 |
| 101Netlink Fixed Wireless | 100 / 20 |
May also be available: T-Mobile, Verizon.
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