Category 2 — Grey Water Damage in South Jordan, UT
Category 2 water damage sits in the middle of the IICRC contamination spectrum — not the clean-source events that most homeowners are comfortable attempting to address, and not the sewage biohazard that everyone understands requires professional response. Grey water occupies the space in between: contaminated enough to pose a genuine health risk, but not always obviously hazardous in the way that sewage is. The risk of underprepared cleanup — without appropriate personal protective equipment, antimicrobial treatment, and proper material removal — is real, and the gap between “it was just the washing machine” and understanding what Category 2 actually requires is where inadequate restoration and failed insurance claims frequently originate.
Grey water calls have a specific emotional texture that clean water calls do not. With a burst pipe, the homeowner is dealing with a problem. With a washing machine overflow that contaminated the finished basement where the kids play, or a dishwasher failure that soaked the kitchen subfloor and the cabinets storing the family’s dishes, the homeowner is dealing with a problem and a question they do not want to ask out loud: is this safe? The answer depends on what category the water actually is, how long it has been there, and whether the cleanup addresses the contamination — not just the moisture. We will tell you honestly what we found and what it requires.
True Day Water Damage Restoration is a licensed Utah Contractor (#960332-3505) and IICRC-Certified Firm (ID #927354-5258). Call us at (385) 247-9359.
Category 2 Sources in South Jordan Properties
Washing machine overflow and supply line failure: Washing machine events are the most common Category 2 source in South Jordan residential properties. The wash cycle introduces biological matter from clothing — including fecal bacteria from soiled garments — and cleaning chemicals into the water, elevating it to Category 2. The hard water scale failures of washing machine supply line fittings from the Jordan Valley Water Conservancy District’s 7-to-10-grain-per-gallon supply add a Category 1-at-source supply line failure to a Category 2 overflow scenario — producing the combined damage profile we respond to most frequently in South Jordan’s established neighborhoods and Daybreak’s townhome stock.
Secondary irrigation system intrusion: South Jordan has one of the highest secondary water connection rates in Salt Lake County — approximately one in four homes has access to the city’s non-potable secondary water irrigation system. The secondary system draws from untreated surface water sources and carries coliform bacteria, soil-borne pathogens, and seasonal agricultural runoff that may include pesticide residue. Secondary water system failures that introduce water into a structure classify as Category 2 or higher — a South Jordan-specific risk factor that contractors unfamiliar with this community do not automatically account for in their assessment.
South Jordan’s secondary water system also carries the broader water quality context of the Jordan River corridor. The Jordan River — which flows northward through the Salt Lake Valley carrying agricultural runoff, stormwater, and treated wastewater effluent from upstream municipalities — contributes to surface water sources that eventually recharge portions of the valley aquifer and supply components of the secondary irrigation network. Local stormwater management programs administered through Salt Lake County and the Jordan Valley Water Conservancy District address runoff quality, but the secondary system is explicitly non-potable and untreated. In secondary water system failure events, we treat the intruding water as Category 2 at minimum and assess the specific contamination profile before determining whether the specific event warrants Category 3 protocols based on what the water has been in contact with before entering the structure.
Dishwasher supply line and drain failures: Food debris, biological matter, and cleaning agents in dishwasher discharge water elevate it to Category 2. Kitchen subfloor saturation from a dishwasher failure that runs undetected — in the cabinet cavity below the appliance — typically involves Category 2 water in contact with the subfloor for many hours before detection.
Bathroom sink and shower drain backflows: Drain backflows from blockages in the shared drain stack introduce water that has been in the drain system — carrying biological matter, soap residue, and hair — as Category 2 contamination onto bathroom flooring and into adjacent wall assemblies.
Category 1 events after 24 to 48 hours: Clean water sitting in contact with cellulose-based building materials at ambient temperature develops bacterial colonization of the organic substrate within 24 to 48 hours, reclassifying the event to Category 2. A supply line failure discovered on Monday morning after a weekend absence — 48 to 72 hours after the event — is almost certainly Category 2 at the time of response regardless of its clean-water origin.
A Category 2 Project in Daybreak
In July 2022, we responded to a washing machine overflow in a 2013-era Daybreak contemporary craftsman home — one of the Energy Star-rated homes that characterize Daybreak’s later construction phases, with a tight building envelope, engineered lumber I-joist floor system, and a finished lower level family room directly below the second-floor laundry room. The front-load washing machine’s door seal had failed during a cycle, discharging the full wash load — roughly 14 gallons of Category 2 water containing detergent and biological matter from a mixed clothing load — through the door gap onto the laundry room floor.
The tight building envelope that makes Daybreak’s Energy Star homes more energy-efficient than older South Jordan construction also slows moisture dissipation from enclosed assemblies — the vapor-retarder wall construction that reduces air infiltration also reduces natural drying rates after a water event. By the time the homeowner discovered the event and called us, the water had been standing for approximately four hours. FLIR thermal imaging showed the Category 2 water had migrated through the I-joist web openings in the floor-ceiling assembly and was present across a 6-by-8-foot cold zone in the lower level ceiling below the laundry room. Moisture meter readings at nine points showed the I-joist lower flanges reading 24% to 31% and the lower level ceiling drywall reading 22% at four points.
Because the water source was Category 2, we applied EPA-registered antimicrobial treatment to all contacted framing surfaces after drying — not an optional step even though the water had not been standing long. The lower level ceiling drywall was removed at the affected section to allow direct antimicrobial treatment of the I-joist framing and to confirm the category boundary. Drying equipment ran for three days. The State Farm HO-3 policy covered the event as a sudden and accidental appliance failure. Total approved claim: $4,870. The homeowner’s question at the end of the project — “why did it go through the floor so fast?” — is one we answer regularly in Daybreak’s I-joist construction. The web openings that make I-joists structurally efficient also make them effective conduits for water migration between levels.
What Category 2 Requires That Category 1 Does Not
Appropriate personal protective equipment for technicians; antimicrobial treatment of all hard surfaces that contacted grey water at appropriate EPA-registered product concentration and contact time; removal of porous materials — carpet, padding, insulation, drywall that has absorbed significant grey water contamination — rather than drying in place; documentation of contamination category for the insurance claim; and more conservative assessment of material salvageability than Category 1 events permit.
Category 2 can degrade to Category 3 if it contacts sewage-contaminated materials, if it contains sufficient biological load for significant microbial amplification, or if it remains standing for more than 72 hours. A washing machine overflow that spreads to a basement floor drain with residual sewage contamination becomes Category 3 at the point of contact.
- Why is toilet bowl overflow Category 2 rather than Category 3?
- Bowl water has been in contact with drain plumbing and bowl surfaces colonized with enteric bacteria — significantly contaminated, but not at the gross sewage level of Category 3. If visible sewage material is present, or if the overflow is from a blocked drain rather than the bowl itself, treat as Category 3.
- Can carpet be dried in place after Category 2 water damage?
- No. Carpet and pad in contact with Category 2 water must be removed and disposed of as regulated waste. ANSI/IICRC S500 specifies material removal minimums for Category 2 that require removal of porous materials that cannot be adequately disinfected in place.
Learn more: Water Damage Restoration | Sewage Cleanup | Category 3 Black Water | Insurance Claims
True Day Water Damage Restoration | 11268 S 2865 W, South Jordan, UT 84095 | (385) 247-9359 | License: #960332-3505 | IICRC: #927354-5258