Four Rivers Sanitation Authority
Graceffa Administration Building
3501 Kishwaukee Street
Rockford, Illinois 61109

Phone: (815) 387-7500

Important Customer Notification Regarding New February Billing

We recently experienced a billing issue affecting bills dated 2/13/26. The problem has been corrected, and a new bill issued. “Please review the bill display carefully to ensure that both the name and address are correct and match the intended information. If you encounter a bill that is blank or contains only an address with […]

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BNR Improvements –Aeration Basin Modifications

Capital Project No. 2304 IEPA Project No. L17-6576 Four Rivers Sanitation Authority (FRSA) covers approximately 100 square miles of Winnebago County in northern Illinois.  FRSA serves over 290,000 people in the communities of Rockford, Loves Park, Machesney Park, Roscoe, Cherry Valley, New Milford, Winnebago, a portion of Rockton, and several unincorporated areas within Winnebago County.  […]

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2024 Rate Adjustment: Amended Sept. 1, 2024

On September 1, 2024, FRSA updated the annual rate ordinance to reflect the move to monthly billing. All rates remained the same. The amounts were amended to reflect a monthly, rather than a quarterly rate. The average residential customers’ wastewater bill will will average $35.74 monthly, which equates to a quarterly bill of approximately $107.22 […]

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Cultivating a Culture of Innovation

Full article as it appears in the April 2024 edition of Water Environment & Technology (WE&T) magazine How planning, partnerships, and perspective can help de-risk emerging technologies  Innovating existing processes and approaches often represents a challenge in the justifiably risk-averse culture of water resource recovery facilities (WRRFs). However, during an age in which new threats […]

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Aerobic Granular Sludge Project, Phase 1, Capital Project No. 2207 IEPA Project No. L17-6127

Aerobic Granular Sludge Project, Phase 1 – replace existing Primary Clarifiers 3 and 4 with two (2) new Primary Filter units (PF1 and PF2) and one (1) gravity thickener tank which includes process piping and valving, plumbing, HVAC, electrical, instrumentation and controls; civil, geotechnical, structural and architectural improvements; and all other necessary appurtenances for a complete, operable system

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