Louisville MSD FY2027 Commercial Wastewater and Drainage: Three Wastewater Lines, One Separate Parcel Fee
Louisville MSD’s final FY2027 Jefferson County commercial wastewater, infrastructure, meter, quality, and drainage rules, effective September 1, 2026.
Direct answer
Louisville MSD’s final FY2027 Jefferson County schedule, approved July 27 and effective September 1, 2026, sets a $101.90 fixed charge for a two-inch commercial meter, $7.62 per 1,000 gallons for regular volume, and $2.39 per 1,000 gallons for infrastructure. A declared 100,000-to-80,000-gallon comparison changes those included wastewater lines by $200.20; drainage, quality, and Louisville Water charges remain separate.
$7.62
Regular volume
Per 1,000 gallons, effective September 1
$2.39
Infrastructure
Per 1,000 gallons; greater of a $20.01 minimum
$101.90
Two-inch fixed
Monthly commercial wastewater charge
$15.39
Class B drainage
Per ESU monthly; one ESU is 2,500 ft²
Service area, class, and bill-line map
Choose the MSD wastewater path before applying an FY2027 amount
The final schedule is future-effective September 1, 2026. This page models one Jefferson County regular-commercial wastewater account and keeps drainage, Louisville Water, quality, and alternate class paths outside that subtotal.
- Bill line or account
- Regular-commercial volume
- How to treat it
- Usage-linked and included: $7.62 per 1,000 gallons under the final Jefferson County schedule effective September 1.
- Bill line or account
- Infrastructure surcharge
- How to treat it
- Usage-linked and included: the greater of $20.01 monthly or $2.39 per 1,000 gallons. The volume formula controls both declared columns.
- Bill line or account
- Two-inch fixed charge
- How to treat it
- Fixed and included: $101.90 per month for the declared meter. It stays unchanged between model columns.
- Bill line or account
- Alternate wastewater classes
- How to treat it
- Outside the model: metered commercial, industrial, optional large-volume, and clean-wastewater paths are alternatives, not charges to stack onto regular commercial.
- Bill line or account
- Quality surcharge
- How to treat it
- Account-specific and outside the model: verify discharge evidence when BOD exceeds 250 mg/L or total suspended solids exceed 270 mg/L.
- Bill line or account
- Class B drainage
- How to treat it
- Site-based and outside the model: $15.39 per ESU per month, with impervious area divided by 2,500 square feet and rounded up to a whole ESU.
- Bill line or account
- Drainage credits and area
- How to treat it
- Approved credits cannot reduce the pre-credit charge by more than 50% or below one ESU. Anchorage, Jeffersontown, St. Matthews, and Shively are outside the listed drainage service area unless an agreement includes an area.
- Bill line or account
- Meter basis and Louisville Water
- How to treat it
- Verify Louisville Water readings or an approved direct/subtraction arrangement for wastewater volume. Louisville Water utility charges are separate and excluded.
Final future-effective schedule
The Jefferson County action was approved July 27 and starts September 1
MSD’s rates page and FAQ describe a final Jefferson County action approved July 27, 2026 and effective September 1, 2026. Until that date, the FY2027 amounts below are future-effective, not current billed values.
MSD reports a 3.9% figure in its official Jefferson County context. That is not a universal multiplier for every commercial line. The final FY2027 schedule controls each commercial amount reproduced here; a commercial percentage comparison would require line-by-line evidence from the prior final schedule.
Regular-commercial formula
The declared wastewater subtotal has one fixed and two usage-linked lines
For the declared two-inch regular-commercial account, the final schedule lists a $101.90 monthly fixed charge, $7.62 per 1,000 gallons of regular-commercial volume, and an infrastructure surcharge equal to the greater of $20.01 monthly or $2.39 per 1,000 gallons.
The $20.01 minimum controls at roughly 8.37 thousand gallons or less. At both 100,000 and 80,000 gallons, the per-volume infrastructure formula is greater, so it is the only infrastructure amount used in the model.
Class and meter forks
Metered, industrial, and optional schedules do not stack
The final schedule publishes other paths for metered commercial, regular and metered industrial, optional large-volume wastewater, and optional clean-wastewater service. Those paths are mutually exclusive alternatives to classify from the account record.
Wastewater volume generally derives from Louisville Water meter readings unless an approved direct meter or subtraction/addition arrangement applies. Verify the actual class, meter, readings, and service area before applying a formula.
Wastewater quality
Strength exposure requires discharge evidence
The final schedule provides quality-surcharge formulas above stated thresholds of 250 milligrams per liter for biochemical oxygen demand and 270 milligrams per liter for total suspended solids. Restaurants, laundries, healthcare, and industrial facilities may need permit, sampling, and pretreatment records.
No quality charge is estimated here. Do not infer one from property type alone or treat a water-volume comparison as proof that strength, monitoring, permit, or other account-specific exposure will move proportionally.
Separate parcel decision
Drainage follows impervious-area ESUs and approved credits
For Class B commercial and industrial parcels in the listed drainage service area, the final schedule sets $15.39 per ESU per month. One ESU represents 2,500 square feet of impervious area, and a fractional result rounds up to the next whole ESU.
Approved retention or detention credits remain limited: the schedule does not allow the charge below 50% of the pre-credit amount or below one ESU. The listed service area excludes Anchorage, Jeffersontown, St. Matthews, and Shively unless an agreement includes an area. Drainage never enters this gallon model.
Commercial bill implication
The declared difference is wastewater-only
At 20,000 fewer declared gallons, regular-commercial volume changes by $152.40 and infrastructure by $47.80. The two-inch fixed charge remains $101.90 in both columns.
The $200.20 result excludes Louisville Water, drainage, quality, permits, monitoring, taxes, penalties, contract terms, optional classes, and site feasibility. It is not a complete combined utility-bill forecast or a guarantee.
Smart Valve analysis — declared wastewater-only example
One Jefferson County regular-commercial account at 100,000 versus 80,000 gallons
Assume the final schedule is in effect, the account is regular commercial in MSD’s Jefferson County service area, the meter is two inches, and the infrastructure volume formula exceeds its minimum. Include only the three listed wastewater lines.
Scroll the table horizontally to compare all columns.
| Included line | 100,000 gal | 80,000 gal | Change |
|---|---|---|---|
| Two-inch fixed charge | $101.90 | $101.90 | Unchanged |
| Regular-commercial volume | $762.00 | $609.60 | Decrease $152.40 |
| Infrastructure surcharge | $239.00 | $191.20 | Decrease $47.80 |
| Declared wastewater subtotal | $1,102.90 | $902.70 | Decrease $200.20 |
The $200.20 is the difference between two future-schedule wastewater-only subtotals. Louisville Water, drainage, quality, permits, monitoring, taxes, penalties, contract rates, optional classes, and operational feasibility are excluded.
20% usage check
$200.20
Modeled partial-bill difference at 20% lower regular-commercial wastewater volume
The declared difference is $152.40 on regular-commercial volume plus $47.80 on infrastructure. The two-inch $101.90 fixed charge remains unchanged.
Boundary: This is reproducible wastewater-only arithmetic under stated assumptions, not guaranteed savings or 20% off the complete bill. Drainage, Louisville Water, quality, and every other exclusion stay separate.
Decision checklist
What to check first on the bill
- 1Confirm the property is in the applicable MSD Jefferson County wastewater service area and that the final schedule is in effect.
- 2Identify regular commercial, alternate commercial, industrial, or optional class and verify the actual meter size.
- 3Reproduce billed wastewater gallons from Louisville Water readings or the approved direct/subtraction arrangement.
- 4Apply the infrastructure greater-of rule and confirm whether the $20.01 minimum or volume formula controls.
- 5Review permits, sampling, BOD, suspended-solids, pretreatment, and quality records before estimating strength exposure.
- 6Verify drainage service area, impervious square feet, whole-ESU rounding, and any formally approved credit.
Scope boundary
Where Smart Valve realistically fits
After service area, effective date, class, meter, wastewater volume, infrastructure treatment, quality evidence, and drainage records are confirmed, a commercial team can review leaks, operating uses, and pressure conditions that may affect controllable metered use.
Smart Valve does not change MSD’s fixed charge, class, infrastructure minimum, drainage ESUs, credit approval, quality formulas, Louisville Water charges, taxes, permits, or contract terms. It cannot guarantee a usage change or complete-bill result.
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The calculator does not reproduce MSD classes, minimums, fixed charges, quality formulas, drainage, or Louisville Water billing.
Review source and estimate boundaries
See how official facts, Smart Valve arithmetic, assumptions, and exclusions are separated.
Frequently asked questions
When do Louisville MSD’s FY2027 Jefferson County rates take effect?
MSD says the final schedule was approved July 27, 2026 and becomes effective September 1, 2026. Before September 1, the amounts on this page are future-effective, not current billed values.
How does the regular-commercial infrastructure minimum work?
The final schedule uses the greater of $20.01 monthly or $2.39 per 1,000 gallons. The minimum controls at roughly 8.37 thousand gallons or less; the volume formula controls both declared model columns.
How is Louisville MSD Class B drainage calculated?
The schedule lists $15.39 per ESU per month, with one ESU equal to 2,500 square feet of impervious area and fractions rounded up. Approved credits have a 50% pre-credit floor and a one-ESU floor, and the listed service area has named municipal exclusions.
Does 20% lower wastewater volume mean 20% off the complete Louisville bill?
No. The declared comparison changes only regular-commercial volume and infrastructure. The fixed charge stays unchanged, while Louisville Water, drainage, quality, permits, taxes, penalties, optional classes, and other lines remain outside the model.
Primary source trail
Sources and retrieval details
Published: Final FY2027 scheduleEffective: September 1, 2026Retrieved: August 3, 2026
Controlling official schedule for fixed charges by meter, commercial and industrial wastewater classes, volume and infrastructure formulas, quality thresholds, drainage ESUs, whole-ESU rounding, credit limits, and service-area treatment.
Published: Final rates noticeEffective: September 1, 2026 for Jefferson CountyRetrieved: August 3, 2026
Official landing page for final Jefferson County rate status and the September 1 effective date. The attached final schedule controls individual commercial amounts.
Source URL: https://louisvillemsd.org/Rates (opens in a new tab)
Published: Updated after July 27, 2026 approvalEffective: September 1, 2026Retrieved: August 3, 2026
Official supporting source for July 27 approval, the stated Jefferson County adjustment, and infrastructure, regulatory, and public-health context. It does not replace the final schedule for commercial dollar values.
Source URL: https://louisvillemsd.org/Rates/FAQ (opens in a new tab)
Editorial contact
Media & product inquiries
Send relevant corrections, launch information, approved assets, or testing opportunities to thesmartwatervalve@gmail.com. Contact does not guarantee coverage, favorable treatment, commercial placement, or a review.
Verify the MSD rate class before modeling wastewater exposure
Bring the current bill, service area, effective date, wastewater class, meter, gallons, infrastructure treatment, quality records, drainage facts, and excluded Louisville Water lines into one source-backed review.