Wisconsin · FOG rules

Milwaukee, WI grease trap requirements

Official sources we checked do not set a fixed pumping interval. Quoted from the official source below — verify with your city.

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Last checked Nov 2, 2026 against Milwaukee Metropolitan Sewerage District (MMSD Rules Ch. 11, amended May 2, 2026) + Wisconsin Plumbing Code SPS 382.34(5)

Program run by Milwaukee Metropolitan Sewerage District (MMSD Rules Ch. 11, amended May 2, 2026) + Wisconsin Plumbing Code SPS 382.34(5). Hand-checked against source Report an error / rule changed

Quick answer

How often to pump: The official sources we checked don't set a fixed schedule for Milwaukee. Most programs require pumping before grease and solids reach 25% of the trap's depth (check yours). Confirm with Milwaukee Metropolitan Sewerage District (MMSD Rules Ch. 11, amended May 2, 2026) + Wisconsin Plumbing Code SPS 382.34(5).
Interceptor minimum / sizing: 750-gallon minimum to a municipal sewer (SPS 382.34)
Permit / fees: Not stated in the sources we checked. Ask Milwaukee Metropolitan Sewerage District (MMSD Rules Ch. 11, amended May 2, 2026) + Wisconsin Plumbing Code SPS 382.34(5) whether a FOG or wastewater permit applies.

From the official source(s) below, last checked 2026-11-02. Rules change; verify with your city.

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Tell us what you need and we'll send your request to the Featured grease trap service companies in Milwaukee, WI, with a copy to us. If there are none yet, it comes only to us and we may reply to help you find someone. Free, no obligation. For restaurants and for property, building and facility managers.

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How often does Milwaukee require grease trap pumping?

Milwaukee's pumping rule is quoted below from the official source. Want a heads-up before your next pump-out? Get free email reminders on Milwaukee's schedule. For restaurants and for property, building and facility managers. How reminders work

Milwaukee: the official sources we checked don't set a fixed pumping interval. Source: Milwaukee Metropolitan Sewerage District (MMSD Rules Ch. 11, amended May 2, 2026) + Wisconsin Plumbing Code SPS 382.34(5), checked 2026-11-02.

Fines: “MMSD sets a local limit of 300 mg/L hexane extractable materials (MMSD 11.203) and prohibits grease that obstructs or reduces sewer capacity (11.202). Permitted users on the 100 mg/L silica-gel alternative limit must keep operating grease traps.” Source: Milwaukee Metropolitan Sewerage District (MMSD Rules Ch. 11, amended May 2, 2026) + Wisconsin Plumbing Code SPS 382.34(5), checked 2026-11-02.

We'll use every 90 days. That's our recommended schedule, not a legal requirement. Many programs also require pumping before grease and solids reach 25% of the trap's depth.

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Yes, email me free grease trap pump-out reminders from GreaseTrapRules for the business and city above: up to 3 emails before each due date. Reminders include a link to request quotes from local pumping companies; nothing is shared with any company unless I send a quote request myself or tick the optional sharing box below. I can unsubscribe in one click from any email. Privacy Policy Optional: let the Featured pumping companies for my city see my business name, city, email and next due date, so they can offer to book my pump-out. Off unless you tick it. You can turn it off any time by replying to any reminder email.

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Rules change; verify with your city. Summaries are plain-English restatements of the official source linked below; “Source says” shows the exact wording. Blank rows mean the sources we checked did not state that rule, not that there is no rule.

Milwaukee grease trap rules at a glance

Grease trap and FOG (fats, oils and grease) rules for restaurants in Milwaukee are set by Milwaukee Metropolitan Sewerage District (MMSD Rules Ch. 11, amended May 2, 2026) + Wisconsin Plumbing Code SPS 382.34(5). The official sources we checked do not set a fixed pumping interval for Milwaukee, so plan on pumping before grease and solids reach 25% of the trap (the most common rule) and follow any schedule on your permit. Sizing: 750-gallon minimum to a municipal sewer (SPS 382.34). The ordinance sets penalties for violations (see Fines & penalties below). Got a FOG violation notice in Milwaukee? What to do.

Of the 2 Wisconsin programs we track, 0 state a pumping schedule and 0 require a permit. We have not verified a pumping company for Milwaukee yet; see Wisconsin pumping companies. Compare all Wisconsin cities.

Milwaukee grease trap & interceptor rules, line by line

Required trap / interceptor type	Any non-dwelling plumbing where cooking grease, fats or oils go into the drains must have grease and oil treatment. All new, altered or remodeled plumbing that discharges to a public sewer must have one or more grease interceptors; with an exterior interceptor, all and only kitchen wastes go to it (SPS 382.34(5)(a), (b)1). ✓ checked against source
Sizing rule	A grease interceptor discharging to a municipal sewer may not be smaller than 750 gallons (1,000 gallons to a private onsite system). Restaurant capacity is calculated with the SPS 382.34(5)(c)2 formula. ✓ checked against source
Pumping / cleaning frequency	Not stated in the sources we checked
Permit required?	Not stated in the sources we checked
Permit & program fees	Not stated in the sources we checked
Inspections	Not stated in the sources we checked
Record keeping	Not stated in the sources we checked
Pumper / hauler approval	Not stated in the sources we checked
Reporting portal	Not stated in the sources we checked
Fines & penalties	MMSD sets a local limit of 300 mg/L hexane extractable materials (MMSD 11.203) and prohibits grease that obstructs or reduces sewer capacity (11.202). Permitted users on the 100 mg/L silica-gel alternative limit must keep operating grease traps. ✓ checked against source
Program contact	Not stated in the sources we checked

Sources

https://docs.legis.wisconsin.gov/code/admin_code/sps/safety_and_buildings_and_environment/380_387/382/iii/34/5 · checked 2026-11-02
https://www.mmsd.com/download_file/view/f5104d82-0d27-49c5-aebf-a5f23c2d9a66/340 · checked 2026-11-02
https://www.mmsd.com/government-business/rules-regulations/rules · checked 2026-11-02

Featured spots in Milwaukee: 3 of 3 available. Free to be listed — pumpers pay a flat $59 only when a request we send becomes a booked job. For pumping companies · Free service record & manifest maker

Grease trap cleaning & pumping companies in Milwaukee, WI

No verified pumping company for Milwaukee yet. Free listings are sorted A–Z. A listing is not an endorsement.

Pump traps in Milwaukee? Free paperwork for every job. Make a service record or manifest PDF with the record fields Milwaukee's rules ask for, signed on your phone and ready to send the restaurant.

Make a Milwaukee service record

Before you book: ask for a full pump-out (not a skim) and a signed manifest for every service, and keep it on site for inspectors.

Be the recommended pumper here. Top-pick pumpers get first look at quote requests from Milwaukee kitchens. Listing is free; you pay a flat $59 only when a request we send becomes a booked job — under a short written agreement first, and nothing for leads that don’t book. 3 of 3 spots left
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Size your interceptor

Use the grease interceptor sizing calculator (UPC, IPC and PDI methods), then confirm Milwaukee's own minimums above. Not sure how often to pump? Read how often to pump a grease trap.

Milwaukee grease trap FAQ

What size grease interceptor is required in Milwaukee?

750-gallon minimum to a municipal sewer (SPS 382.34), per the official source. Your plumbing official can require more.

Who enforces grease trap rules in Milwaukee, WI?

Milwaukee Metropolitan Sewerage District (MMSD Rules Ch. 11, amended May 2, 2026) + Wisconsin Plumbing Code SPS 382.34(5). Contact them for permits, inspections and approved haulers.

Nearby Wisconsin cities

Madison

Grease trap guides

For property and building managersTenant vs landlord, shared interceptors, records How often to pumpThe 25% rule and city schedules FOG inspection checklistWhat inspectors check Printable maintenance logPlus record-keeping rules All guidesSizing, trap vs interceptor, cost factors

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