---
schema_version: "secwatch.filing_event.v1"
accession: "0001410636-26-000007"
form_type: "8-K"
ticker: "AWK"
cik: "0001410636"
company_name: "American Water Works Company, Inc."
filed_at: "2026-01-27T23:59:59+00:00"
generated_at: "2026-05-16T07:29:28.043034+00:00"
event_type: "regulatory"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Illinois American Water files $134M rate case with ICC for $577M in capital investments

## Summary
- Two-step rate increase: $119M effective Jan 1, 2027, plus $15M effective Jan 1, 2028, based on 10.75% ROE.
- Request supports ~$577M in water/wastewater investments through Dec 2027, including 42 miles of pipeline replacement.
- Typical residential water customer bill would rise ~$14/month; wastewater customer ~$28/month, if approved.
- ICC 11-month review process; new rates would take effect Jan 2027 if approved by the Commission.
- Proposed modified allowance discounts first 2,000 gallons for residential water users to improve affordability.

## SEC filing metadata
- accession: 0001410636-26-000007
- form_type: 8-K
- ticker: AWK
- cik: 0001410636
- company_name: American Water Works Company, Inc.
- filed_at: 2026-01-27T23:59:59+00:00
- event_type: regulatory
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1410636/000141063626000007/0001410636-26-000007-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1410636/000141063626000007/awk-20260127.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001410636-26-000007
- JSON: https://secwatch.observer/filing/0001410636-26-000007.json
- Plain text: https://secwatch.observer/filing/0001410636-26-000007.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.