Idaho landlord guide — Soda Springs (carbonated springs, world’s only captive geyser), phosphate mining economy, Oregon Trail landmark, Bear River Valley & Idaho Code §§ 6-301 et seq.
🏛️ County Seat: Soda Springs 👥 Population: ~7,118 (2023 est.) ⚾ Economy: Phosphate mining + agriculture
Caribou County occupies the southeastern corner of Idaho, where the Bear River Valley meets the Caribou Mountains and the rolling terrain of the Caribou-Targhee National Forest stretches toward Wyoming. Established in 1919 from portions of Bannock and Oneida Counties, it covers approximately 1,766 square miles and has a population of about 7,118. The county was named for a gold prospector named “Cariboo Jack” (John Perrot), who worked a mining claim in the area in the 1870s. Soda Springs, the county seat and largest city with around 3,186 residents, sits along the Bear River and has been a landmark on the Oregon Trail since the 1840s, when the naturally carbonated springs along the riverbank provided a rare source of fizzy water for westward migrants who used it as a leavening agent for biscuits. Today the town’s signature attraction is a captive geyser — an inadvertent creation from a 1937 drilling project that punctured a pressurized carbon dioxide reservoir — which shoots a plume of carbonated water approximately 100 feet into the air on a programmed schedule every hour, making it the world’s only captive geyser.
The county’s economy is defined by two pillars: phosphate mining and agriculture. The phosphate-rich Phosphoria Formation, a Permian-era marine deposit, underlies much of southeastern Idaho and southwestern Wyoming. In Caribou County, Bayer’s P4 Production subsidiary operates the only elemental phosphorus manufacturing plant in the United States, which has anchored the local economy since the 1950s under former owner Monsanto. Nutrien (formerly Agrium) and Itafos operate the Conda phosphate mine nearby. These facilities employ hundreds of workers and generate substantial local tax revenue. Agriculture — wheat, barley, seed potatoes, hay, and cattle ranching — provides additional employment and economic diversity. The county is part of the Idaho Pocatello-Chubbuck Metropolitan Area for some statistical purposes and is geographically linked to Bannock County and Pocatello to the northwest.
All landlord-tenant matters in Caribou County are governed by Idaho Code §§ 6-301 et seq. (evictions), §§ 6-320 and 6-321 (security deposits), and §§ 55-208 and 55-307 (tenancy and notice). Eviction actions are filed as Unlawful Detainer proceedings at the Caribou County District Court (Sixth Judicial District), 150 W. 1st South, Suite 2, Soda Springs, ID 83276, (208) 547-4324. Idaho prohibits rent control statewide.
Soda Springs (~3,186 — carbonated springs, captive geyser, Oregon Trail)
Population
~7,118 (2023 est.); 2020 census: 7,027
Key Communities
Soda Springs (~3,186), Bancroft (~323), Grace, Henry, Chesterfield (ghost town — NRHP)
Median HH Income
~$66,653 (2023)
Median Rent
~$950/month (Soda Springs)
Principal Economy
Phosphate mining (Bayer P4 Production — only elemental phosphorus plant in U.S., ~400 workers; Nutrien/Itafos Conda mine); agriculture (wheat, barley, seed potatoes, hay, cattle); Caribou-Targhee NF; county government; Caribou Memorial Hospital (25-bed critical access)
Oregon Trail
Historic Hooper Spring and Bear River crossings were major Oregon Trail landmarks; significant historical tourism
LDS Character
Strong LDS community; Brigham Young purchased land at Soda Springs in 1871; settled largely by Mormon pioneers
Rent Control
Prohibited statewide (Idaho Code § 55-304)
Landlord Rating
5/10 — Stable phosphate industry employment; moderate income; affordable market; agricultural base; no local ordinances; steady but not growing population
⚖️ Eviction At-a-Glance
Nonpayment Notice
3-Day Notice to Pay or Vacate
Lease Violation
3-Day Notice to Perform or Quit
No-Cause (Month-to-Month)
30-Day Written Notice
Court
Caribou County District Court — Magistrate Division (6th Judicial District)
Courthouse Address
150 W. 1st South, Suite 2, Soda Springs, ID 83276
Court Phone
(208) 547-4324
Court Hours
Mon–Fri 8:00 a.m.–5:00 p.m.
Process Name
Unlawful Detainer
Post-Judgment
Writ of Possession; tenant has 72 hrs to vacate
Security Deposit
No cap; return within 21 days; 3× penalty for wrongful withholding
Avg Timeline
3–5 weeks typical
Caribou County Local Ordinances & Landlord Rules
Idaho state law governs landlord-tenant matters — no supplemental local ordinances in Caribou County
Category
Details
No Local Ordinances
Neither Caribou County nor the City of Soda Springs has enacted local landlord-tenant ordinances supplementing Idaho state law. No rental registration requirements, no source-of-income protections, no additional notice requirements. Idaho Code §§ 6-301 et seq. applies exclusively throughout the county.
Rent Control
Idaho Code § 55-304 prohibits rent control statewide. No jurisdiction in Caribou County may enact rent stabilization. Month-to-month rent increases require 30 days’ prior written notice before the rent due date.
Security Deposit
No statutory cap under Idaho law. At Caribou County’s typical rents of ~$950/month, one-month deposits of ~$950 are common. Idaho Code § 6-321 requires return or itemized written deductions within 21 days of tenancy end (up to 30 days if specified in lease). Failure to comply forfeits the right to withhold any portion and exposes the landlord to 3× damages plus attorney fees. Move-in documentation is essential.
Phosphate Industry as Rental Market Anchor
The phosphate mining and processing sector is the single most important driver of Caribou County’s private rental market. Bayer’s P4 Production facility employs approximately 400 workers in the production of elemental phosphorus — a critical industrial chemical used in herbicides, flame retardants, and other products. This is the only such facility in the United States, and its continued operation provides a degree of economic resilience that most rural Idaho counties of comparable size lack. Nutrien’s Conda mine and Itafos’s phosphate operations add additional employment. Mine and plant workers who do not own homes locally represent the most stable rental demand in the county. Their incomes are generally above the county median and their employment is with large corporate employers with established payrolls — making income verification straightforward for landlords.
Agricultural Economy
Agriculture contributes approximately 20% of the county’s GDP, employing about 11.7% of the workforce. Key crops include wheat, barley, seed potatoes, and hay; cattle ranching is also significant. The Bear River Valley’s irrigated bottomlands produce the most intensive agricultural output. Agricultural workers — both owner-operators and hired hands — round out the rental market. Ranching family income is more variable than industrial employment income; landlords should verify annual income rather than monthly pay stubs for agricultural applicants.
The Geyser and Tourism
Soda Springs’ captive geyser — the only one in the world — shoots a plume of carbonated water 100 feet into the air every hour on the hour and is a genuine tourist curiosity. The Oregon Trail connections, Hooper Spring, and Caribou-Targhee National Forest draw visitors who support the county’s hospitality sector. Tourism employment is seasonal and modest in scale, but NPS and USFS seasonal employees may seek short-term housing in Soda Springs during their service periods.
Idaho Code §§ 6-301 et seq. — statutes, notice requirements, and landlord rights that apply in Caribou County
⚡ Quick Overview
3
Days Notice (Nonpayment)
3
Days Notice (Violation)
15-30
Avg Total Days
$166
Filing Fee (Approx)
💰 Nonpayment of Rent
Notice Type3-Day Notice to Pay or Quit
Notice Period3 days
Tenant Can Cure?Yes
Days to Hearing5-12 days
Days to Writ3-5 days
Total Estimated Timeline15-30 days
Total Estimated Cost$200-$500
⚠️ Watch Out
Idaho is very landlord-friendly with fast timelines. 3-day notice is one of the shortest in the nation. No state-mandated cure period beyond the notice.
Serve the required notice based on the eviction reason (nonpayment or lease violation).
Wait for the notice period to expire. If tenant cures the issue (where allowed), the process stops.
File an eviction case with the Magistrate Court. Pay the filing fee (~$166).
Tenant is served with a summons and has the opportunity to respond.
Attend the court hearing and present your case.
If you prevail, obtain a writ of possession from the court.
Law enforcement executes the writ and removes the tenant if necessary.
⚠️ Disclaimer: This page provides general information about Idaho eviction laws and does not constitute legal advice.
Eviction procedures can vary by county and may change over time. Local jurisdictions may have additional requirements or tenant protections.
For specific legal guidance, consult a qualified Idaho attorney or local legal aid organization.
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⚠️ Disclaimer: These calculations are estimates based on state statutes and typical court timelines. Actual results vary by county, court backlog, and case specifics. Always verify current requirements with your local courthouse. This is not legal advice.
~7,118 residents. Soda Springs (county seat, captive geyser, Hooper Spring, Oregon Trail). Bayer P4 Production (only elemental phosphorus plant in U.S., ~400 workers). Nutrien/Itafos phosphate mines. Agriculture: wheat, barley, potatoes, hay, cattle. Caribou-Targhee NF. Chesterfield ghost town (NRHP). Median rent ~$950. No local ordinances. 3-day nonpayment notice. No deposit cap; 21-day return. No rent control. 6th JD, 150 W. 1st South, Suite 2, Soda Springs, (208) 547-4324, Mon–Fri 8am–5pm.
Caribou County
Screen Before You Sign
Best tenant profiles in Caribou County: Bayer P4 Production plant employees (large corporate employer, stable income, easy income verification); Nutrien/Itafos mine workers; Caribou Memorial Hospital healthcare staff; Caribou County School District teachers; county government employees. For agricultural workers: verify annual income rather than monthly pay stubs, as farm/ranch income is seasonal and variable. Run Idaho court records. 3x income-to-rent minimum.
Phosphate, Prairie, and the Oregon Trail: Landlording in Caribou County, Idaho
The Oregon Trail crossed the Bear River at Soda Springs, and travelers who made it this far — approximately 1,000 miles into their journey from the Missouri River — often paused to marvel at the naturally carbonated springs that bubbled up along the riverbank. The springs produced water that fizzed like soda, could be flavored with sugar and citric acid for a crude lemonade, and could be mixed with dough as a leavening agent in place of the baking soda that many travelers had exhausted. Hooper Spring, still accessible to visitors today, was one of the most celebrated landmarks on the entire 2,000-mile trail. When a 1937 drilling project accidentally punctured a pressurized CO2 reservoir beneath Soda Springs, the resulting geyser — capped and programmed to go off every hour — became the world’s only captive geyser and a permanent local attraction. Caribou County’s landlord-tenant matters are governed by Idaho Code §§ 6-301 et seq., but the county’s character runs considerably deeper than any statute.
The Phosphate Economy: America’s Only Elemental Phosphorus Plant
Phosphate is not a glamorous industry, but it is an essential one — and in Caribou County, it is the industry that determines whether the local economy flourishes or contracts. The Phosphoria Formation, a Permian-era marine sedimentary deposit approximately 250 million years old, contains some of the richest phosphate ore in North America, and southeastern Idaho sits directly above it. Bayer’s P4 Production subsidiary operates the Monsanto-era phosphorus plant in Soda Springs that has been processing phosphate ore into elemental phosphorus since the 1950s. This facility is the only elemental phosphorus manufacturing plant in the United States — a distinction that gives Caribou County a degree of industrial uniqueness that few rural Idaho counties of comparable size can claim. The plant employs approximately 400 workers and has been the county’s largest private employer for over 65 years. Nutrien (formerly Agrium, now including the Itafos Conda operations) adds additional mine employment. These phosphate operations collectively anchor the county’s above-average median household income of approximately $66,653 — meaningfully higher than many peer rural Idaho counties.
For landlords, this industrial employment profile is significant. Phosphate plant and mine workers have verifiable corporate incomes, established payroll systems, and employment with large institutions that carry standard income documentation. A plant worker at Bayer’s P4 facility is exactly the kind of tenant whose income can be quickly and reliably verified — making the screening process more straightforward than markets dominated by self-employment, seasonal agriculture, or variable income sources.
The Oregon Trail Legacy and LDS Settlement
Caribou County’s cultural character was shaped by two waves of American history that arrived in the same generation. The Oregon Trail brought tens of thousands of westward migrants through the Bear River valley in the 1840s through 1860s, many of whom stopped at the Soda Springs waypoint before pressing on toward the Pacific. Among those who came and stayed were members of The Church of Jesus Christ of Latter-day Saints, who established agricultural settlements throughout the county beginning in the 1870s. Brigham Young himself purchased land at Soda Springs in 1871. The LDS settlement patterns — organized by ward and stake, oriented toward agricultural self-sufficiency, and culturally cohesive — shaped the county into the conservative, community-oriented community it remains today. The Chesterfield ghost town, now listed on the National Register of Historic Places and accessible as a preserved LDS pioneer settlement, stands as a remarkably intact testament to this period.
Idaho’s Eviction Process in Caribou County
The Caribou County District Court at 150 West 1st South, Suite 2, in Soda Springs serves the Sixth Judicial District. Phone: (208) 547-4324. Hours are Monday through Friday, 8:00 a.m. to 5:00 p.m. For nonpayment evictions, the 3-Day Notice to Pay or Vacate begins the process — the 3-day clock starts the day after proper service on the tenant. If the tenant does not pay in full within that window, the landlord files the Unlawful Detainer complaint at the courthouse. Following a judgment for the landlord, the tenant has 72 hours to vacate voluntarily before the Caribou County Sheriff enforces a Writ of Possession. Idaho’s 3-day cure window is among the shortest in the Mountain West — landlords who serve notice correctly and follow up promptly can resolve nonpayment situations relatively quickly by regional standards.
Security deposit handling is particularly important in this market. At ~$950/month rent, a one-month deposit represents $950 in held funds. Idaho’s 3x damages penalty for wrongful withholding means that a landlord who fails to return or account for a $950 deposit within 21 days can face $2,850 in damages plus attorney fees. Move-in condition checklists signed by both parties, and photographs organized by date and room, provide the documentation that protects landlords in any deposit dispute.
Caribou County landlord-tenant matters governed by Idaho Code §§ 6-301 et seq. (evictions), §§ 6-320 and 6-321 (security deposits), and §§ 55-208 and 55-307 (tenancy and notice). Nonpayment: 3-day pay or vacate. Lease violation: 3-day perform or quit. No-cause termination (month-to-month): 30-day written notice. Security deposit: no cap; return within 21 days (up to 30 if lease specifies); 3x penalty for improper handling. No rent control (Idaho Code § 55-304). No local landlord-tenant ordinances. Eviction: Unlawful Detainer at Caribou County District Court (6th Judicial District), 150 W. 1st South, Suite 2, Soda Springs, ID 83276; (208) 547-4324; Mon–Fri 8am–5pm. 72-hour post-judgment vacate; Writ of Possession if tenant remains. Consult a licensed Idaho attorney before taking legal action. Last updated: May 2026.
Disclaimer: This page provides general information about landlord-tenant law in Caribou County, Idaho and is not legal advice. Laws change frequently. Always verify current requirements with a licensed Idaho attorney before taking legal action. Last updated: May 2026.
