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Use City of Nampa sources for account balances, shutoff status, payment arrangements, current rates, emergencies, water-quality notices and other time-sensitive or account-specific information.
Nampa Water Department Customer Service: Phone & Help 2026
City of Nampa water customer guide
Call the Right Nampa Water Number for Billing, Service, Leaks or Emergencies
The City of Nampa separates Utility Billing from the operational Water & Irrigation Division. That distinction matters when you need fast help.
For bills, account questions, start/stop service, autopay or same-day account service, call (208) 468-5711. The current Utility Billing office hours are Monday–Friday, 7:30 a.m.–5:30 p.m.
For a water-system problem, emergency shutoff, domestic or irrigation issue, call Water & Irrigation at (208) 468-5860. The City says this number also serves as its 24-hour emergency water hotline.
Start here
Nampa Water Department Customer Service Quick Facts
If the issue is about the account, start with (208) 468-5711. If the issue is about water physically flowing, not flowing, leaking, a meter shutoff or a field emergency, start with (208) 468-5860.
Avoid transfers
Utility Billing vs. Water & Irrigation: Which Nampa Office Handles Your Problem?
Call (208) 468-5711
- Water/sewer/trash bill questions
- Online account help
- Start service
- Stop service
- Same-day account activation questions
- Autopay setup or cancellation
- Payment arrangements
- Nampa Shares & Cares questions
- Contact-information updates
Call (208) 468-5860
- Water emergency
- No water caused by a field issue
- Water-main or service problem
- Immediate meter shutoff for plumbing repair
- Domestic-water operations
- Irrigation-water operations
- Hydrants and water infrastructure
- After-hours water emergency
The Utility Billing page specifically directs customers who do not have water and need same-day service to call (208) 468-5711. For an operational emergency such as a break or field shutoff, use Waterworks at (208) 468-5860.
Account and payment help
Nampa Utility Billing Customer Service
Nampa Online Utility Billing
The City says customers can access utility accounts online 24 hours a day, 365 days a year.
Combined Utility Bill
Nampa’s utility billing system combines qualifying water, sewer and trash charges into the City utility account.
Billing Cycle
The City’s utility billing materials describe the normal utility bill as bi-monthly.
E-Reminders
The City encourages customers to keep current email and telephone information on file so account reminders and other important notices can reach them.
Do not assume that moving automatically closes the utility account. Submit a stop-service request or call Utility Billing so charges do not continue under your name.
Before you call
What Nampa Utility Billing Can Help You Fix
Payment Not Showing
Have the amount, payment date, account number and confirmation or check information ready.
Wrong Contact Information
The City provides an online form to update the phone number or email associated with a utility account.
High Consumption
Submit the City’s leak-check request if you need Waterworks to confirm whether the meter has active flow.
Moving In
Use the start-service form. Routine online requests can take up to 48 hours to process.
Moving Out
Use the stop-service form and provide a forwarding address for the final utility bill.
Cannot Pay in Full
Call before the shutoff date to ask about available payment arrangements or assistance.
Moving in
How to Start Nampa Water, Sewer & Trash Service
Start Water / Sewer / Trash Services
Use the City’s encrypted Form Center request for routine new utility service.
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1
Enter the service address
Use the address where water, sewer and trash service should begin.
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2
Choose a requested start date
Online requests can take up to 48 hours. Orders cannot be completed on weekends or City holidays; those requests move to the next business day.
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3
Provide customer information
The current form requests the customer name, mailing address, Social Security number, phone and email, plus owner/tenant information.
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4
Prefer not to enter a Social Security number online?
The City says you can establish service by visiting the Utility Billing office with photo identification instead.
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5
Account creation
If the City needs more information or cannot create the account, Utility Billing will contact you. Otherwise, the current form states that no follow-up message can mean the account was created.
Do not rely on the online form. Call Utility Billing at (208) 468-5711 for same-day service questions.
Setup cost
Nampa New Water Account Fee & Possible Deposit
$34 Service Request Fee
The current City start-service form states that a $34 fee for starting services is included on the first bill.
$150 Residential Deposit
The City says a $150 residential deposit may be required. Utility Billing will contact the customer when a deposit is needed.
$300 Commercial Deposit
The current form lists a possible $300 commercial deposit.
The City’s wording says the residential or commercial deposit may be required. Wait for Utility Billing’s account-specific instruction before assuming a deposit applies.
Moving out
How to Stop Nampa Water Service
Stop Water / Sewer / Trash Services
Routine stop requests may take up to 48 hours to process.
- Customer name Use the name associated with the current utility account.
- Last four digits of Social Security number The current encrypted stop-service form requests this verification field.
- Service address Enter the address that should no longer receive services under your account.
- Stop date Weekend or holiday stop orders are completed on the next business day.
- Forwarding address Provide a destination for the final utility bill.
- Phone and email Use current contact details in case Utility Billing needs clarification.
Do not use the routine stop-service form. The City directs customers to Waterworks at (208) 468-5860 for an immediate repair-related shutoff.
Automatic payments
Nampa Water Bill Autopay
The City offers direct debit for its bi-monthly water, sewer and trash utility bill using an eligible checking or savings account.
Auto Debit Application
Utility Billing warns that setup can take up to 10 business days. Pay the current bill separately when its due date falls inside that setup window.
If the due date is approaching while the new direct-debit request is still processing, submit a separate payment to avoid a possible service interruption.
Past-due account help
Nampa Water Payment Arrangement Before Shutoff
The City’s Utility Billing Guidelines state that customers facing an emergency that requires a payment arrangement can request a pre-termination conference by contacting Utility Billing before the scheduled shutoff date.
Do not assume an online payment-plan option will appear automatically. For an account facing disconnection, contact Utility Billing directly and confirm what must be paid and by when.
Low-income utility help
Nampa Shares & Cares Utility Bill Assistance
The Nampa Shares & Cares Program helps qualifying City of Nampa customers with utility billing. The City currently works with the Nampa Salvation Army on the application process.
Income Qualifications Apply
The current City assistance page directs residents to an application process and explicitly notes that income qualifications apply.
City information: (208) 468-5711
Local Donations
Nampa customers can make tax-deductible donations through the program. The City says donated utility-bill funds stay local and help Nampa residents.
Nampa Shares & Cares
Check current eligibility and application requirements rather than relying on older income limits or brochure amounts.
24-hour water help
Nampa Water Emergency Phone Number
Waterworks / Water & Irrigation
The City’s Waterworks FAQ says the emergency hotline is available 24 hours a day.
No Water
If the issue appears to be a field or water-system problem rather than an account activation issue, contact Waterworks.
Main / Service Leak
Report significant water flowing from City infrastructure and provide the nearest address or intersection.
Repair Shutoff
If private plumbing repairs require immediate water shutoff, the City’s stop-service form directs customers to Waterworks at this number.
Nampa’s Waterworks FAQ states that curb-stop valves are City property and are intended for use by City employees in emergencies. For domestic water, contact Waterworks when the meter needs to be shut off.
High bill / possible leak
Request a Nampa Water Meter Leak Check
Utility Billing provides an online Leak Check Request when customers suspect continuous water use.
Leak Check Work Order
The request asks Waterworks to check whether the meter shows water flow at the time of inspection.
Confirm Meter Flow
If the meter shows flow during the check, that can be an indicator that water is being used or leaking somewhere beyond the meter.
Locate the Leak
The City’s request specifically says the check cannot determine where the water is leaking.
Up to 48 Hours
The City says the request may take up to 48 hours, and staff will call after the work order is completed.
Before submitting a leak check
- Check toilets. Silent toilet leaks can consume substantial water without visible flooding.
- Check irrigation. Broken sprinkler lines, stuck valves or irrigation use can raise consumption.
- Check faucets and hose bibs. Look for continuous dripping or outdoor water use.
- Compare recent bills. Determine whether the change is usage-related or a different utility charge.
Current vs. older fee sheets
Nampa Utility Fees: What Is Confirmed for 2026?
$34 Start-Service Fee
The current City start-service form explicitly states that the $34 service request fee is included on the first bill.
Reconnect / Miscellaneous Fees
The Utility Billing page links to a miscellaneous-fee guideline, but the underlying fee sheet carries an older revision date. Call (208) 468-5711 for the amount currently applicable to a reconnect, returned payment, after-hours turn-on or meter-related charge.
Account fees are consequential and can change. This guide uses the $34 start-service amount because it is stated directly on the current start-service form; other miscellaneous charges should be confirmed with Utility Billing before payment.
2026 rate schedule
Nampa Water Rates in 2026
The current Utility Billing page links to a City rate schedule titled “Water Inside City Limits & SE 2 Rates” effective February 1, 2026.
Rates can vary by service category and account circumstances. Use the City-linked 2026 rate document or call Utility Billing before estimating an account from an older rate table.
The official billing page maintains the current water, trash and utility billing documents used by customers.
Local infrastructure
How Large Is Nampa’s Water System?
Nampa’s Water & Irrigation Division also reports maintaining 17,504 water valves, while its separate irrigation system contains more than 530 miles of irrigation lines.
A property can have questions involving drinking water, pressurized irrigation or both. Tell City staff which system is affected when reporting an outage or leak.
Source and treatment
Nampa Drinking Water Quality & Source
The City says Nampa’s drinking-water supply comes from 17 groundwater wells drawing from the Snake River Plains Aquifer, supported by five domestic booster stations.
Nampa Does Not Add Fluoride
The City’s Water Quality page states that Nampa does not add fluoride to drinking water. Any fluoride present is naturally occurring.
Chlorine
The City states that chlorine is currently the only item it adds to drinking water, in accordance with drinking-water requirements.
Nampa publishes annual reports explaining water sources and monitored drinking-water constituents.
Separate water service
Nampa Irrigation Water vs. Domestic Drinking Water
Potable Drinking Water
Groundwater from Nampa’s domestic wells is used for drinking, cooking, bathing and other household or business needs.
Seasonal Irrigation System
The Water Division separately operates an extensive irrigation network. The City reports delivering more than 44.7 million gallons of irrigation water per day during system operation.
When calling about an outage, low flow or leak, tell Waterworks whether the issue involves domestic drinking water or irrigation water.
Service interruption
Where to Check Nampa Water Outages
The Waterworks FAQ states that domestic and irrigation outage updates are posted through the City’s Nextdoor communications.
Known Neighborhood Outage
Check City communications for an announced domestic or irrigation outage before assuming the issue is isolated to your property.
Unreported / Emergency Problem
Call Waterworks at (208) 468-5860, especially when water is actively flowing from public infrastructure or service is unexpectedly unavailable.
One Water Nampa
Nampa Water Conservation & Irrigation Tips
Nampa’s One Water Nampa program promotes efficient outdoor water use, drought resilience and reuse of treated water.
- Water less frequently and more deeply. The City notes that daily lawn watering encourages shallow roots.
- Consider odd/even scheduling. Homes with even numbers can water on even dates and odd-numbered homes on odd dates.
- Use waterwise plants. Low-water-use landscaping is better adapted to Nampa’s climate.
- Fix irrigation leaks. Broken sprinkler heads and valves waste water and can contribute to unexpectedly high usage.
The City reports contributing approximately 11 million gallons of Class A recycled water per day to the Phyllis Canal during irrigation season, representing about 15% of community irrigation needs.
Avoid missed notices
Update Your Phone or Email on a Nampa Utility Account
Nampa provides an online account-contact update form so Utility Billing has the current telephone number and email address.
Email / Phone Number Update
The form requests the customer name, utility account number, service address and updated contact information.
The City uses current account contact information to help send billing reminders and pertinent account information.
Addresses and hours
Nampa Water Department Offices
City of Nampa Utility Billing
401 3rd St. S.
Nampa, ID 83651
Phone: (208) 468-5711
Current published hours:
Monday–Friday, 7:30 a.m.–5:30 p.m.
The current Utility Billing page notes limited staffing on Mondays and Fridays while accommodating the extended hours.
Water & Irrigation Division
24 1st St. S.
Nampa, ID 83651
Phone: (208) 468-5860
Office hours:
Monday–Friday, 7:00 a.m.–5:30 p.m.
The same Waterworks number is identified by the City as its 24-hour emergency water hotline.
Utility Billing and Water & Irrigation have different physical addresses. Use 401 3rd St. S. for ordinary account/billing business and 24 1st St. S. for Water & Irrigation operations.
Directions
Nampa Utility Billing & Waterworks Maps
Utility Billing
401 3rd St. S.
Nampa, ID 83651
Account, billing, payment, start/stop service and assistance questions.
Water & Irrigation Division
24 1st St. S.
Nampa, ID 83651
Domestic water, irrigation, meters, field service and emergencies.
Get faster help
What to Have Ready Before Calling Nampa Water Customer Service
Utility account number, service address, current bill and exact charge you are questioning.
Payment amount, date, payment method and confirmation/check information.
Service address, requested start date, customer identity information and landlord/rental information when applicable.
Service address, stop date, verification information and forwarding address.
Customer name, service address, phone, email and a description of unusual water use.
Exact location, nearest cross street and whether the issue affects domestic water, irrigation or both.
Understand City terminology
Nampa Water Department Terms
- Utility Billing
- The City office handling water, sewer and trash utility accounts, billing, payments, start/stop service and assistance.
- Water & Irrigation Division
- The Public Works division responsible for Nampa’s domestic and irrigation water systems.
- Domestic Water
- Potable drinking water supplied through Nampa’s municipal groundwater system.
- Irrigation Water
- Water delivered through Nampa’s separate irrigation system for landscape and irrigation use.
- Leak Check
- A City work-order request that checks whether a utility meter shows flow at the time of inspection.
- Auto Debit
- Automatic withdrawal of the bi-monthly utility bill from an eligible checking or savings account.
- Nampa Shares & Cares
- A City utility-assistance program for qualifying Nampa customers with income requirements.
- Snake River Plains Aquifer
- The groundwater source from which Nampa’s domestic drinking-water wells draw supply.
- Curb Stop
- A water service shutoff valve owned by the City that Nampa says should be operated by City employees.
- Water Quality Report
- The annual report describing Nampa’s drinking-water sources and monitored water-quality results.
Frequently searched questions
Nampa Water Department Customer Service FAQs
What is the City of Nampa Water Department customer service phone number?
What are Nampa Utility Billing office hours?
What is Nampa’s 24-hour water emergency number?
Where is the Nampa water billing office?
How do I start water service in Nampa?
How much does it cost to start Nampa utility service?
Can Nampa check my water meter for a leak?
Does Nampa offer water bill assistance?
Where does Nampa drinking water come from?
Does Nampa add fluoride to its drinking water?
Primary verification
Official City of Nampa Sources
- City of Nampa — Utility Billing
- City of Nampa Online Utility Billing
- City of Nampa — Water & Irrigation Division
- City of Nampa — Start Service Form
- City of Nampa — Stop Service Form
- City of Nampa — Auto Debit Form
- City of Nampa — Leak Check Request
- City of Nampa — Account Contact Update
- City of Nampa — Nampa Shares & Cares
- City of Nampa — Water Quality Reports
- City of Nampa — Domestic Water
- City of Nampa — Waterworks FAQs
- City of Nampa — One Water Nampa