Water Reclamation & Discharge Compliance: the full procedure

Keep wash water flowing to the approved system and the reclaim equipment serviced so the business stays inside its discharge permit.

• Applies to: Shift leads, maintenance, owner
• Frequency: Daily checks; per permit schedule
• Scope: Covers the operating routine that keeps wash water going to the correct approved destination and reclaim equipment maintained. ALL discharge limits, permitting, treatment standards, and reporting DEFER to EPA NPDES/stormwater rules, the local sewer authority/pretreatment permit, state regulations, and the business’s discharge permit. This SOP does not set discharge limits.

What you need

• Reclaim system manufacturer manual
• Drain/sump map
• Permit binder
• Reclaim filter/media log
• Do-not-discharge signage
• Maintenance log

The procedure, step by step

1. Confirm wash water goes to the approved destination — Verify wash water routes to the sanitary sewer or on-site treatment/reclaim as the permit requires — never to a storm drain.
2. Know your permit before the day starts — Keep the discharge/pretreatment permit on file and follow its conditions; EPA and the local authority, not the crew, set the limits.
3. Inspect drains and sumps — Check that sumps, pits, and interceptors are draining to the right system and are not bypassing to stormwater; report any cross-connection immediately.
4. Maintain reclaim equipment on schedule — Service filters, media, and the reclaim unit per the manufacturer’s manual; log each service so cycles are not missed.
5. Keep chemicals and fluids out of storm drains — Ensure no detergent, soap, or automotive fluid reaches a storm drain or runs across pavement to a waterway — this is an illicit discharge.
6. Record required readings/samples — Take and log any readings or samples the permit requires, on the permit’s schedule, for the owner’s records.
7. Escalate any out-of-spec condition — Stop and notify the owner/manager if discharge appears out of permit; do not continue discharging while unsure.

Quality check before you finish

• Wash water confirmed to approved destination, never storm drain
• Current discharge/pretreatment permit on file and followed
• Sumps and interceptors draining correctly with no cross-connection
• Reclaim equipment serviced per manufacturer schedule and logged
• No detergent or automotive fluid reaching stormwater
• Permit-required readings/samples recorded on schedule
• Out-of-spec conditions escalated, not ignored

This is a free, source-anchored standard operating procedure (SOP) you can print and hand to staff. It documents the work sequence for a Car Wash business — not safety or regulatory rulings, which defer to the cited authorities, the applicable code, and your own health-and-safety plan. Open the tool above to print it, toggle ink-saver, or (with a free ToolFluency Business account) edit it to match your own workflow.

Sources

• EPA NPDES stormwater & vehicle-wash discharge (https://www.epa.gov/npdes)
• Reclaim equipment manufacturer manual (https://www.carwash.org)
• Local sewer authority / pretreatment permit (https://www.epa.gov/npdes/pretreatment-program)