# Washington County Ionwave #PUR-1840 Addendum 2

Washington County chemical supply solicitation for pool and water/wastewater treatment

**Posted:** October 01, 2026
**Respond By:** October 29, 2026
**Identifier:** PUR-1840 Addendum 2
**NAICS:** 424690, 424710, 325180

Washington County, Maryland, is seeking bids to supply swimming-pool and water/wastewater treatment chemicals to County operations and participating municipalities.
- **Buyer:** Board of County Commissioners of Washington County, Maryland, Office of Procurement; participating users include the City of Hagerstown, Washington County departments, and the Town of Boonsboro.
- **Scope:** 42 chemical line items covering disinfectants, coagulants, acids, caustic soda, polymers, carbon sources, treatment additives, and gases. The quantities below are estimated annual usage, not guaranteed purchases; orders are placed as needed.
- **Prominent specified products and OEMs:** Shannon Chemical Corp. **SLI-5250** poly-orthophosphate is mandatory, with no other manufacturers’ blends accepted. **Thioguard** magnesium hydroxide and **methanol** are also specified as no-substitution items. Other named products or brands include **DelPAC 2000**, **PAX-XL6**, **DelPAC 2020**, **Zetag 8814**, **Micro C 2000**, **Morton Salt**, **Mtek T**, **MB012SF**, **Hydra-Darco B**, and **Methanex** (methanol pricing index). Named tablet-chlorine brands include **PPG**, **Olin**, and **HTH**, or equal.
- **Selected annual quantities:** 100 one-ton cylinders of liquid chlorine; 190,000 lb of 19% ammonia; 1,000 wet tons of polyaluminum chloride; 75,000 gallons each of Thioguard and methanol; 180,000 lb of SLI-5250; and 210,000 lb of magnetite. See line items for all listed estimates, packaging, and delivery formats.
- **Notable requirements:** Aqua Ammonia substitutions are not accepted. Methanol pricing is based on the Methanex North American Index plus markup, with monthly adjustments. Chlorine and sulfur dioxide gas are ordered together; typical deliveries are 10–15 chlorine cylinders and 6–12 sulfur dioxide cylinders. Products are subject to applicable drinking-water, AWWA, and ANSI/NSF requirements, with specifications varying by item.
- **Contract term:** One year, with no option years specified. Quantities are estimates and are not guaranteed.

### Description

Washington County is soliciting electronic bids for delivery of swimming pool and water/wastewater treatment chemicals for its departments and agencies, and on behalf of the City of Hagerstown and Town of Boonsboro. The contract period is December 1, 2026, through November 30, 2027. Bid lines include a range of treatment chemicals in specified quantities and packaging; submissions must be made through the online bidding system. Addendum 2 updates the methanol index reference to September 2026 and confirms monthly price adjustments.

[View original listing](https://washco-md.ionwave.net/PublicDetail.aspx?bidID=531&SourceType=1)