Spokane's Environmental Rules: The Rules That Matter

Every city handles environmental rules a little differently. In Spokane, Washington, there are 9 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Stormwater Management

Spokane enforces strict stormwater rules under SMC 17D.060 and the NPDES Phase II MS4 permit. The Spokane-Rathdrum Aquifer (sole-source aquifer) and Spokane River require infiltration-based treatment. New development must manage runoff via the Spokane Regional Stormwater Manual.

Key details: Aquifer: Sole-source protected. Trigger: 5,000 sq ft disturbance. Manual: Spokane Regional Stormwater. Permit: NPDES Phase II MS4. Fine: Up to $10,000/day.

Illicit discharge: up to $10,000/day under state law. Unpermitted development: stop-work orders, mitigation, and SEPA review.

This is one of the stricter rules in Spokane's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

Erosion Control

Spokane requires erosion and sediment control plans for any land-disturbing activity over 500 sq ft under SMC 17D.060. Construction sites use silt fences, straw wattles, and inlet protection per the Spokane Regional Stormwater Manual. DOE CSWGP covers 1+ acre sites.

Key details: City Trigger: 500 sq ft disturbance. State Permit: 1 acre CSWGP. Inspections: Weekly on CSWGP sites. Winter Rule: Enhanced Nov-Mar. Code: SMC 17D.060.

ESC failures: stop-work order, fines $500-$10,000 depending on discharge. DOE CSWGP violations: up to $10,000/day.

Compared to other cities, Spokane takes a harder line on erosion control. The enforcement and penalty structure reflects that.

Grading & Drainage

Spokane requires grading permits under SMC 17F.070 for earthwork exceeding 50 cubic yards or 500 sq ft of disturbance. Steep slopes (over 30%) trigger SMC 17E.030 critical-area review. Drainage must comply with the Spokane Regional Stormwater Manual.

Key details: Permit Threshold: 50 cubic yards. Disturbance: 500 sq ft. Steep Slope: Over 30% grade. Code: SMC 17F.070. Drainage: Cannot harm neighbor.

Unpermitted grading: stop-work order, restoration, fines up to $1,000/day. Geotechnical failures causing off-site damage: civil liability.

Climate Emergency Mobilization

Spokane's 2021 Sustainability Action Plan sets greenhouse gas reduction goals targeting 95% below 2016 levels by 2050, guiding city operations, building codes, and transportation policy across departments.

Key details: Adopted: 2021. 2030 Target: 30% below 2016. 2050 Target: Net-zero emissions. Lead Office: Sustainability Action Subcommittee.

No direct fines on residents. Plan guides city procurement, codes, and capital projects rather than imposing penalties on property owners or businesses.

Heat Island Mitigation

Spokane's Comprehensive Plan and Sustainability Action Plan call for tree canopy expansion, green infrastructure, and cooling centers to reduce heat island impacts in downtown and West Central neighborhoods most exposed to summer heat.

Key details: Program: SpoCanopy partnership. Lead Plan: Sustainability Action Plan. Cooling Centers: Activated by SRHD. Topic: Heat Island Mitigation.

No private property fines tied directly to heat island rules. Tree code violations under SMC Ch. 12 carry separate penalties handled by Urban Forestry.

Spokane is more permissive than most cities when it comes to heat island mitigation. That said, there are still limits.

Vehicle Idling Restrictions

Spokane has no broad citywide vehicle idling ban for residents, but state diesel idling rules and school zone policies discourage extended idling near sensitive receptors like schools and hospitals.

Key details: Citywide Cap: None for cars. Diesel Rules: State WAC 173-450. Air Agency: Spokane Clean Air. Topic: Idling Restrictions.

No municipal idling fine for cars. State commercial diesel violations and Clean Air Agency burn ban infractions can carry penalties up to several hundred dollars per occurrence.

If you are coming from a city with tighter rules, you will find Spokane gives residents more flexibility on vehicle idling restrictions.

Sustainable Procurement

Spokane's purchasing rules direct city departments to favor recycled-content paper, ENERGY STAR equipment, and lower-emission vehicles when life-cycle costs are comparable, supporting Climate Action Plan implementation.

Key details: Applies To: City departments only. Fleet Goal: Electrify light-duty. Paper Preference: 30%+ recycled. Topic: Sustainable Procurement.

No public penalties. Non-compliance is handled internally through the purchasing department and contract review rather than fines on residents or businesses.

If you are coming from a city with tighter rules, you will find Spokane gives residents more flexibility on sustainable procurement.

Cool Roof Requirements

Spokane has no cool-roof mandate, but the Sustainability Action Plan and Washington State Energy Code encourage reflective roofing, added insulation, and shade trees to reduce summer heat island effects in dense neighborhoods.

Key details: Residential Mandate: None. Commercial Code: WSEC reflectance. Incentives: Avista rebates. Topic: Cool Roof.

No standalone cool-roof citations. Energy code non-compliance on new commercial buildings can block permit final inspection and certificate of occupancy.

Spokane is more permissive than most cities when it comes to cool roof requirements. That said, there are still limits.

Flood Zones

Spokane participates in the National Flood Insurance Program. The Spokane River, Latah Creek (Hangman Creek), and Little Spokane River have mapped FEMA floodplains. SMC 17E.030 (Critical Areas) regulates development in floodways and 100-year floodplains.

Key details: Major Risks: Spokane River, Hangman Creek. Freeboard: 2 ft above BFE. Code: SMC 17E.030. Program: NFIP participant. Floodway: No fill allowed.

Unpermitted floodplain work: mandatory removal, fines up to $500/day, loss of NFIP community rating, potential insurance non-coverage.

Compared to other cities, Spokane takes a harder line on flood zones. The enforcement and penalty structure reflects that.

The Bottom Line

Compared to many U.S. cities, Spokane gives residents more room on environmental rules. 4 of the 9 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.

Keep in mind that Spokane can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.