Illinois American Water Company - West Suburban District
Chicago West Suburban service area
Population reference
Approximately 73,978 people for EPA CWS IL1974151, the West Suburban service-area record.
Billing detail
Broad public detail found
Official destination
Open provider website ↗Provider-specific findings
Billing and account research from public material
Provider-specific research notes are displayed separately from fields that contain only an unavailable-information marker. Read qualifiers in each note and verify current account terms with the provider.
- Billing frequency
- Monthly for general metered water service. The tariff states that bills are rendered and payable monthly in arrears, with prorated initial and final bills when service starts or ends within a billing period.
- Rate structure
- Illinois Commerce Commission-regulated, district-specific tariff with meter-size fixed/service charges, usage charges per 100 gallons, QIP and other approved riders, taxes, and municipal additions where applicable. The 2026 tariff is effective in part April 1, 2026; Illinois American filed a new $577 million 2026 rate request that remains subject to ICC approval.
- Wastewater and sewer calculation
- Where Illinois American provides wastewater, the tariff uses a district-specific residential collection/treatment or collection-only service charge plus a per-100-gallon usage charge, and may include approved riders and taxes. The reviewed tariff does not establish a universal winter-average formula for every West Suburban municipality; local service-area schedule and the bill control.
- Meter reading
- The tariff permits estimated bills when necessary, using similar preceding/subsequent periods or corresponding prior-year usage and a usage-per-day calculation. The reviewed West Suburban pages do not identify a single AMI/AMR vendor or transmission interval for this CWS; MyWater provides account usage visibility and alerts.
- New-account deposit
- The Illinois tariff permits the company to require a reasonable advance deposit to secure payment, but the reviewed West Suburban public tariff does not state one universal residential dollar amount, credit-check waiver, or refund timing. Deposit treatment is governed by ICC rules and the customer's account circumstances.
- Activation or transfer fee
- The current Chicago Metro tariff lists customer activation at $10.00. MyWater supports turn-on/off requests; the exact West Suburban transfer workflow and any municipal connection charges should be confirmed with 1-800-422-2782.
Context, not a score
How documentation coverage compares
This profile
86%
overview fields with research notes
Illinois
30%
records with any overview detail
National index
50%
records with any overview detail
Coverage measures what this directory documented. It does not measure service quality, affordability, or regulatory compliance.
Research record
Broad public detail found
6 of 7 fields in this section contain provider-specific public detail in dataset August 1, 2026.
Documented
86%
Details not confirmed in the reviewed public material
- Residential cost reference
“Not confirmed” means the directory did not identify a dependable public statement. It does not mean the provider has no policy or option.
Primary verification routes
- Illinois American Water Company - West Suburban District public website ↗
Provider-controlled destination used to confirm current customer instructions.
- EPA SDWIS / ECHO lookup (IL1974151) ↗
Search the federal drinking-water database using public water system ID IL1974151.