Oshkosh Water Bill Help Desk: Pay, Log In, Call or Fix a High Bill
Use this as a fast utility guide: choose the problem, open the correct official page, prepare the exact account details, and avoid payment-posting or wrong-phone-number mistakes.
Oshkosh Utility Action Board
Most searchers need one of these actions, not a long article. Pick your problem and use the right official route.
Log in
AquaHawk shows statements, balance, usage and leak alerts.
Move service
Use official start/stop forms or call 920-232-5325.
| Need | Use this | Prepare first | Important detail |
|---|---|---|---|
| Pay online | Online Bill Pay | Utility account, amount, payment method, email. | Credit/debit fee: 2.75% with $1.95 minimum; one-time utility e-check: $1.95. |
| AquaHawk login | AquaHawk account | Service address, account info, contact method. | Use for usage graphs, leak alerts, estimated bill and threshold alerts. |
| Pay by phone | 888-412-1013 | Account details and payment method. | Official 24-hour automated payment/balance line. |
| Billing question | 920-232-5325 | Bill, account, service address, payment proof. | Also used for starting or stopping service. |
| Meter replacement | 920-232-5336 | Door card, address, availability. | Call if a card was left for water meter replacement. |
| Mail payment | City of Oshkosh, PO Box 94350, Palatine, IL 60055-4350 | Check/money order and bill stub. | Do not mail if you are near shutoff or due-date deadline. |
| In-person payment | City Hall, 215 Church Avenue, Oshkosh, WI 54903-1130 | Bill, ID if needed, cash/check/card. | Dropbox is available after hours at City Hall. |
| Lead service line help | 920-236-5258 | Address, service-line material, inspection status. | Call before starting private-side lead replacement if seeking assistance. |
Official Oshkosh Water Utility Information
City Hall / Utility Billing
City of Oshkosh
215 Church Avenue
P.O. Box 1130
Oshkosh, WI 54903-1130
Main phone: 920-236-5000
Hours: 8:00 AM-4:30 PM
Water Utility
Oshkosh Water Utility is operated through the Public Works Department.
Source water: Lake Winnebago.
Population served: over 66,000 residents.
Locality
City: Oshkosh
County: Winnebago County
State: Wisconsin
Service users: residents and businesses inside the city water utility system.
Best user tip: for live balance, login, statement, or due-date questions, AquaHawk and Utility Billing are more useful than a general search result. Use official pages linked in this guide, not ad-style payment websites.
Pay, Login or Check Balance Without Confusion
Choose the correct route
Pay only: use Online Bill Pay or phone line. View usage/login: use AquaHawk. Questions: call Utility Billing at 920-232-5325.
Match the account
Before paying, match service address, customer/account details, invoice date, due date, current balance and past-due amount.
Check fee and cap
Credit/debit cards for utility billing are 2.75% with $1.95 minimum. One-time utility e-check is $1.95. Recurring ACH AutoPay for utility bills is free.
Save proof
Save confirmation number, payment date/time, amount, method, last four digits, screenshot and email receipt.
| Payment method | Official detail | Best for | Watch out |
|---|---|---|---|
| Online Bill Pay / InvoiceCloud | Online Bill Pay | Fast utility bill payment. | Card/e-check fees apply unless free recurring ACH AutoPay is used. |
| AquaHawk login | oshkwi.aquahawk.us/login | Statements, balance, water usage, leak alerts. | Use threshold alerts to catch high usage before the bill arrives. |
| Phone payment | 888-412-1013 | 24/7 payment or balance check. | Have account and payment details ready before calling. |
| City of Oshkosh, PO Box 94350, Palatine, IL 60055-4350 | Normal payments with enough time. | Not ideal for late bills, tax roll risk or shutoff concerns. | |
| In person | 215 Church Avenue, Oshkosh, WI 54903-1130 | Cash/check/card users and users needing counter help. | Office hours are 8:00 AM-4:30 PM; dropbox is after-hours. |
Official payment links:
Oshkosh Water Utility Phone Numbers
Billing / start-stop
Use for bill questions, start service, stop service and account help.
| Department / need | Phone / contact | Use this when |
|---|---|---|
| City main phone | 920-236-5000 | You are unsure which department handles your issue. |
| Water/Sewer bills & service | 920-232-5325 | Bill, payment, start/stop, account, landlord/tenant, moving. |
| Department of Public Works Director / general water questions | 920-236-5065 | General Public Works / Water Utility planning or policy questions. |
| Lead service line / financial assistance | 920-236-5258 | Private-side lead replacement assistance, lead drinking-water questions. |
| Lead water testing response line | 920-236-5251 | Lead FAQ says to call this 24-hour response line for lead water testing. |
| Water Filtration Plant / lead sample household | 920-236-5165 | Lead FAQ points lead-service residents interested in becoming a lead sample household to the Water Filtration Plant. |
| Inspections Department | 920-236-5050 | Pool permit number needed for pool adjustment. |
Water or Sewer Emergency: What to Say
After-hour emergencies: call 920-236-5165. For billing questions during business hours, call 920-232-5325.
| Problem | Say this | Have ready |
|---|---|---|
| No water / low pressure | “My address is [address]. I have no water/low pressure at [all taps/some taps]. It started at [time].” | Address, cross street, neighbors affected, visible construction, cold weather. |
| Street leak / water main issue | “Water is surfacing at [location]. It is flowing toward [direction].” | Nearest address, pavement damage, photos only if safe. |
| Sewer backup | “Wastewater is backing up at [floor drain/toilet/basement]. We stopped using water.” | Address, fixture affected, whether neighbors are affected, safety risk. |
| Brown/rusty water | “Water changed color at [time] and affects [hot/cold/all taps].” | Tap location, clear-glass photo, nearby work, flushing/hydrant activity if known. |
Start, Stop or Transfer Water Service
New tenant
Use the official Application for New Tenants online form.
New owner
Use the official Application for New Owner online form.
Tenant moving out
Use Application to Discontinue Water Service for Tenants.
Seller moving out
Use Application to Discontinue Water Service for Seller.
| Situation | Prepare | Official action |
|---|---|---|
| New tenant | Service address, move-in date, tenant name, phone, email, landlord info. | Start / Stop Service page |
| New owner | Closing date, buyer name, service address, mailing address, contact details. | Use the official new-owner form or call 920-232-5325. |
| Seller | Closing date, forwarding address, account/service address, final bill contact. | Use seller discontinuation form. |
| Tenant leaving | Move-out date, forwarding address, landlord/property manager details. | Use tenant discontinuation form. |
Official forms:
2026 Utility Billing District Due Dates
Oshkosh utility bills are mailed monthly. The official 2026 calendar lists District 1, District 2 and District 3. Check your bill or AquaHawk to know your district.
| 2026 month | District 1 due date | District 2 due date | District 3 due date |
|---|---|---|---|
| January | Jan. 2, 2026 | Jan. 8, 2026 | Jan. 22, 2026 |
| February | Feb. 5, 2026 | Feb. 12, 2026 | Feb. 19, 2026 |
| March | Mar. 5, 2026 | Mar. 12, 2026 | Mar. 19, 2026 |
| April | Apr. 2, 2026 | Apr. 9, 2026 | Apr. 16, 2026 |
| May | May 1, 2026 | May 7, 2026 | May 14, 2026 |
| June | Jun. 4, 2026 | Jun. 11, 2026 | Jun. 18, 2026 |
| July | Jul. 2, 2026 | Jul. 9, 2026 | Jul. 16, 2026 |
| August | Aug. 1, 2026 | Aug. 6, 2026 | Aug. 13, 2026 |
| September | Sep. 3, 2026 | Sep. 10, 2026 | Sep. 17, 2026 |
| October | Oct. 1, 2026 | Oct. 8, 2026 | Oct. 15, 2026 |
| November | Nov. 1, 2026 | Nov. 5, 2026 | Nov. 12, 2026 |
| December | Dec. 1, 2026 | Dec. 3, 2026 | Dec. 17, 2026 |
Do not guess your district: if your bill looks late, check AquaHawk or the official invoice calendar because the bill date and due date depend on the district cycle.
2026 Rates, Fees and Bill Math
The City says water rates changed 06/01/23, sewer rates changed 01/01/25 and storm water rates changed 01/01/25. Bills can be prorated when rates change during a billing period.
Water example
1,000 cubic feet = 10 billing units.
Water volume: 10 × $6.10 = $61.00.
Sewer example
Sewer volume charge: $7.12 per 100 cubic feet.
1,000 cubic feet sewer volume = $71.20.
Stormwater
Average residential storm water charge: $20.32 per ERU.
Undeveloped properties: no charge.
| Rate / fee | Official amount | Why it matters |
|---|---|---|
| Water fixed charge: 5/8" or 3/4" | $9.94/month | Common residential meter size. |
| Water fixed charge: 1" | $15.00/month | Some residential/business accounts. |
| Water volume charge | First 1,000 cu. ft. at $6.10 per 100 cu. ft. | Used in the city’s bill example. |
| Sewer fixed charge: 5/8" or 3/4" | $12.39/month | Added before sewer volume charge. |
| Sewer volume charge | $7.12 per 100 cu. ft. | Usually based on water use. |
| Public fire protection: 5/8" or 3/4" | $4.07/month | Appears as a separate charge. |
| Stormwater average residential | $20.32 per ERU | Separate stormwater utility charge. |
| Return check fee | $35.00 | Failed payment or returned item cost. |
| Late payment | 1% per month of bill balance | Added when not paid by due date. |
| Card payment cap | $10,000 including fees | Utility billing credit/debit maximum. |
| ACH/EFT cap | $125,000 including fees | Utility billing ACH/EFT maximum. |
Residential example from city calculator: with 1,000 cubic feet, a 5/8" or 3/4" monthly total for water, sewer, fire protection and average storm water is shown as $178.92; a 1" meter example is shown as $198.26.
High Bill, Leak Alert or Same Bill Every Month
AquaHawk leak alerts
Free for Oshkosh water customers. Alerts can come by email, text or phone when usage indicates high usage, a leak, or a trend toward a high bill.
100 cubic feet
Oshkosh bills in 100 cubic foot increments. 100 cubic feet equals about 748 gallons.
Same bill?
Because usage is rounded down to 100 cubic feet, similar habits can produce the same bill even if actual gallons vary slightly.
| Check | Official detail | What to do |
|---|---|---|
| Toilet leak | Not all toilet leaks are easily heard. | Add food coloring to tank; if color appears in bowl within 30 minutes, fix leak and flush after test. |
| Meter flow finder | City meters have a blue spindle or black triangle flow finder. | If it moves while no water is used, you likely have a leak. |
| All-day meter check | Read meter before leaving when house is empty. | If reading changes before return, investigate hidden leak. |
| Faucet drip | One drip per second can waste about 2,700 gallons per year. | Replace washer, clean aerator and check inside/outside faucets. |
| Door card | Utility staff leave cards for metering equipment checks or replacement. | Call 920-232-5325 or meter replacement 920-232-5336 if instructed. |
Leak Adjustment and Pool Adjustment Rules
Leak adjustment
- Repair must be completed; turning water off is not considered a repair.
- Form must be received at Utility Billing Office Room 106 within 3 months of repair.
- Credit can apply only to the last three billing periods ending with repair date.
- City reviews account after a 3-4 week test period to make sure leak is repaired.
- Adjustment only affects volume rate and may be a small credit.
Pool adjustment
- One sewer usage adjustment per year per account.
- Pool permit number is required from Inspections: 920-236-5050.
- Record inside meter reading before and after filling.
- Report filling within 3 months; sooner is better.
- Account must be current with no past-due balance.
| Adjustment | Information required | How to report |
|---|---|---|
| Leak | Type of leak, repair date, who repaired it, where water discharged, how long it leaked, number of occupants, changes in usage. | Call 920-232-5325 or use the leak adjustment form. |
| Pool | Permit number, before/after meter readings, fill date, shape, dimensions, capacity, amount filled. | Call 920-232-5325 or submit the pool adjustment form. |
Lead Service Line Help: Inspection, Map and Assistance
Free inspection
Property owners can sign up for a free water service line inspection. No account creation is needed after choosing the appointment option.
Local scale
City FAQ says Oshkosh has about 7,300 confirmed lead lines and up to 2,100 additional unknown-material lines out of about 21,500 total water service lines.
Financial help
For assistance, call Public Works at 920-236-5258 before starting private-side replacement.
| Question | Answer | Action |
|---|---|---|
| How does inspection work? | Owner signs up; city technician or approved plumber visits; pipe near meter is inspected; city updates database. | Water Utility page |
| Will the city force replacement if lead is found? | FAQ says no if it remains undisturbed, but all lead service lines will require replacement in the future. | Ask about voluntary replacement list and assistance. |
| What if the lead line leaks? | FAQ says yes, it must be replaced and you will have 180 days. | Call 920-236-5258 immediately. |
| Typical cost? | FAQ says roughly $4,000-$7,000, with possibility of assistance. | Get multiple quotes and ask about city requirements before work. |
| Can payments be spread out? | FAQ says yes under the current financial assistance program. | Confirm eligibility before signing a contractor agreement. |
| How do I reduce lead exposure now? | Use cold water for drinking/cooking, flush after standing, clean aerators, and use certified filters if needed. | Review city lead guidance and EPA/NSF filter guidance. |
Do not start private-side lead replacement first: the financial assistance page says property owners must apply to the City before starting private-side lead water service line replacement to remain eligible.
Water Quality, PFAS and Cross Connection
Water source
Oshkosh drinking water is drawn from Lake Winnebago and treated/distributed by the Water Utility Division.
Consumer Confidence Report
The CCWR explains drinking water quality and potential health concerns. The official resources page links the 2025 CCWR.
PFAS
Oshkosh Public Works says it follows PFAS health guidelines for regular water testing and lists UCMR/DNR sample results.
| Topic | User should know | Official route |
|---|---|---|
| PFAS | Official page explains PFAS, health concerns, and sample-result links. | PFAS Information |
| Cross connection survey | Residential inspections are no-cost and check basement/outside plumbing, softeners, hose bibs, laundry tubs, boilers, toilets and irrigation. | Water Utility Resources |
| Backflow protection | Most common residential non-compliance is hose bibs without backflow prevention. Water Utility may supply a hose bib vacuum breaker. | Follow survey instructions when contacted. |
| Lead exposure reduction | Flush pipes after water sits, use cold water for drinking/cooking, clean aerators monthly and consider NSF/ANSI lead filters. | Lead in Drinking Water |
Water Meter Replacement and Door Cards
Why a card may be left
Utility service staff may leave cards to check metering equipment or replace water metering equipment.
Who to call
Water Meter Replacement Program questions: 920-232-5336.
Before appointment: clear the area around the water meter, make sure an adult can provide access, and ask if shutoff time or access to basement/utility room is needed.
Oshkosh Water Utility Map and Address
For counter help, payments and City Hall utility billing, use 215 Church Avenue, Oshkosh, WI 54903-1130. Mail payments go to the Palatine, Illinois payment lockbox listed by the City.
| Place | Address | Use for |
|---|---|---|
| City Hall / Utility Billing | 215 Church Avenue, Oshkosh, WI 54903-1130 | In-person payment, dropbox, utility billing help, forms. |
| City mailing address | P.O. Box 1130, Oshkosh, WI 54903-1130 | General city mailing address. |
| Utility payment mailing lockbox | City of Oshkosh, PO Box 94350, Palatine, IL 60055-4350 | Mail utility payment by check, money order or cashier’s check. |
| Service locality | Oshkosh, Winnebago County, Wisconsin | Water utility service to city residents and businesses. |
What to Do Next by Problem
Payment did not show
- Wait for settlement window if paid online.
- Log in to InvoiceCloud/AquaHawk if available.
- Call 920-232-5325 with confirmation number.
- Ask whether any past-due balance remains.
Past-due or late fee
- Call before mailing payment.
- Ask exact amount needed today.
- Ask whether online confirmation protects account.
- Remember late charge is 1% per month after due date.
Leak found
- Repair first; turn-off alone is not enough.
- Document repair date and who repaired it.
- Submit leak adjustment within 3 months.
- Expect review after a 3-4 week test period.
Oshkosh Water Utility FAQ
What is the Oshkosh Water Utility billing phone number?
Call 920-232-5325 for water/sewer bills, billing questions, and starting or stopping service.
What is the 24-hour Oshkosh utility payment phone number?
Call 888-412-1013 to make a utility payment or check balance through the automated phone service.
What is the after-hours emergency number?
For after-hour emergencies, the City lists 920-236-5165.
Where do I log in for Oshkosh water usage?
Use AquaHawk at oshkwi.aquahawk.us/login to view statements, account balance, water usage and leak alerts.
Where can I pay in person?
Pay in person at City Hall, 215 Church Avenue, Oshkosh, WI 54903-1130. A dropbox is available after hours.
Where do I mail an Oshkosh utility payment?
Mail payment to City of Oshkosh, PO Box 94350, Palatine, IL 60055-4350.
What are the online utility bill fees?
For real estate tax and utility billing, credit/debit cards are 2.75% with a $1.95 minimum. One-time utility e-check is $1.95. Recurring AutoPay ACH/EFT for utility bills is free.
How often are Oshkosh utility bills mailed?
Oshkosh utility bills are mailed monthly, and the city publishes 2026 bill and due-date calendars by District 1, 2 and 3.
Why is my water bill the same every month?
Oshkosh bills in 100 cubic foot increments, about 748 gallons, and rounds usage down to the number of 100 cubic feet used. Similar usage habits can produce the same bill.
How do I test for a toilet leak?
Add food coloring to the toilet tank and do not flush. If color appears in the bowl within 30 minutes, there is likely a leak. Flush after the test to avoid staining.
Can I get a leak adjustment?
Possibly. A repair must be completed, and the form must be received by Utility Billing within 3 months of repair. The city reviews only eligible billing periods and usually tests usage for 3-4 weeks after repair.
Can I get a sewer credit for filling a pool?
Yes, the City offers one pool adjustment per year per account when requirements are met. You need the pool permit number, before/after meter reads, fill date, dimensions, capacity and other details, and must report within 3 months.
What if I got a water meter replacement card?
Call 920-232-5336 for the Water Meter Replacement Program or call 920-232-5325 if the card tells you to contact Utility Billing.
How do I check lead service line information?
Use the City’s Water Utility lead service line pages and inspection program. For financial assistance or lead questions, call 920-236-5258 before starting replacement work.
Is this the official Oshkosh Water Utility website?
No. This is an informational guide. Always confirm live balance, fees, due dates, notices, shutoff status, water quality instructions and emergency routing with official City of Oshkosh sources.
30-Second Oshkosh Utility Checklist
Pay: Online Bill Pay or 888-412-1013 → save confirmation.
Login: AquaHawk → view usage, statements, leak alerts and thresholds.
Call: Billing/start-stop 920-232-5325; after-hours emergency 920-236-5165; meter replacement 920-232-5336.
High bill: check AquaHawk, toilet dye test, meter flow finder, dripping faucets and leak adjustment rules.
Moving: use official new tenant/new owner/discontinue service forms or call Utility Billing.
Lead: sign up for inspection, check material inventory, call 920-236-5258 before private-side replacement.