Semiconductor fabrication plants (fabs) manage water as a process material, a cooling and utility resource, and a pollution-control input. They take in water from local or utility supplies, purify part of it to ultrapure-water (UPW) quality, keep wastewater streams separate when their contaminants require different treatment, reuse water where its quality and the application allow, and discharge the remainder under permits. The exact treatment train, recycling rate, water source and environmental risk vary by facility and watershed.
Water is only one part of a fab’s environmental profile. Energy-intensive purification, treatment chemicals and residuals, local basin stress, permitted discharges, and fluorinated greenhouse-gas emissions from wafer processing all need to be considered together.
As an Amazon Associate I earn from qualifying purchases.
Why semiconductor fabs need so much water
Wafer manufacturing uses water repeatedly for rinsing, wet etching, solvent processing and planarization. Those steps require UPW, whose ionic, organic and particle content is controlled far more tightly than ordinary industrial or municipal water. A fab also uses water outside the wafer process: cooling systems, facility utilities and pollution-control equipment such as exhaust scrubbers all require reliable supplies.
Recommended Free Tools
Water uses reported in an industry assessment
A NIST programmatic environmental assessment published in June 2024, citing an IEEE 2023 study, attributed the following shares of facility water use to the study’s semiconductor sites:
#1 Best Overall
- Valued Carpenter Pencil Set: You will get 2 pcs solid carpenter pencils with 26 piece 2.8 mm refills, 1 replaceable sharpener, 1 plastic storage box.The complete carpenter pencils combination allows you to finish your work faster and more easily
- Deep Hole Marker Pencil: The deep-hole construction pencils adopts 45mm elongated tip design, which is more convenient to mark in the small hole or in other tight areas that other carpenter markers cannot reach
- Carpenter Pencils with Sharpener: The sharpener is screwed into the top of the work pencil, which won't get lost either. Built-in pencil sharpener that keep the lead with pointed and smooth to Improves line of sight in fine work
- Stronger Solid Lead: This work pencil is matched with a 2.8 mm thick lead , which is much thicker and stronger during the drawing process of construction work, it will not break or damage easily
- Marks on Various Surfaces: 3 colors solid construction pencil can marks on various surfaces,such as metal, plastic, wood, paper etc. Ideals for woodworkers, contractors, craftsmen, builders, merchants and masons
| Use category | Share reported in the cited study | Examples |
|---|---|---|
| Semiconductor processing | 48% | Wafer production, wet etching, solvent processing and planarization |
| Facility support | 23% | Cooling and related plant utilities |
| Abatement technologies | 20% | Equipment that controls process exhaust and other pollutants |
These percentages describe the cited study, not a standard allocation for every fab. A plant’s product mix, climate, cooling design, abatement equipment and water-recovery projects can change the balance.
UPW requires more incoming water than the final product volume
UPW is made through multiple physical and chemical treatment steps. Reject water and losses in pretreatment, membrane systems and polishing mean that the incoming volume can exceed the amount delivered as UPW. The NIST assessment, citing Govindan (2022), reports that producing 1,000 gallons of UPW can require approximately 1,400 to 1,600 gallons of municipal water. The ratio is an estimate represented in that assessment, not a guarantee for every plant or treatment design.
The same NIST assessment, citing Wang and colleagues, reports median UPW use of 4.25 billion gallons across 29 facilities in 2021, equivalent to 1.16 million gallons per day. That figure describes the 29-facility dataset and should not be read as the daily demand of a typical individual fab.
The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →How a fab’s water system works
1. Source water enters a controlled plant system
Fabs obtain water through local utilities, municipal systems or other permitted sources. Engineers must examine both the reliability of that supply and the watershed from which it is drawn. A large, dependable connection does not eliminate drought, allocation or community-supply risks if the surrounding basin is already stressed.
2. Pretreatment protects the UPW equipment
Incoming water is conditioned before it reaches the final UPW polishing stages. Pretreatment removes suspended material and reduces constituents that would foul membranes, ion-exchange equipment or other purification units. The required sequence depends on source-water chemistry and the UPW specification for the process tools.
Rank #2
- Ergonomically Designed: Work in tight areas with a compact design that gets into tough spots
- Both tools are designed to fit into difficult to reach spaces
- Complete a wide range of applications with a high-performance motor that delivers up to 300 UWO, and an impact driver delivering up to 1,400 in-lbs of torque
- Both the DEWALT impact driver and drill driver feature integrated LED work lights with a convenient 20-second delay, ensuring enhanced visibility in dimly lit or challenging work areas
- One-Handed Loading - Keep one hand free with a 1/4 in. hex chuck that accepts 1 in. bit tips
3. UPW is distributed to process tools
Once purified, UPW is circulated to wafer-production tools and rinsing points. The system must maintain the required quality at the point of use, not merely at the treatment plant outlet. Process areas may use UPW for wet etching, solvent processing, planarization and repeated rinses.
4. Separate utility and abatement loops operate alongside process water
Cooling equipment, scrubbers and other facility systems may accept water with a different quality requirement from UPW. Keeping these applications distinct can prevent over-treating water that does not need semiconductor-grade purity and can make recovery projects more practical.
Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Why fab wastewater is not one single stream
Water leaving a fab can come from etching and post-process rinses, cleaning and degreasing, polishing, UPW-reject systems, cooling operations, scrubbers and other support activities. Each stream can carry a different combination of dissolved chemicals, particles, metals, fluorides, organics or changes in pH. Combining all flows at the first drain can make treatment less efficient and can expose a low-contaminant stream to contaminants that would otherwise have been easier to recover.
Representative streams and management needs
| Source activity | Why it is separated or characterized | Examples of treatment or handling reported by EPA |
|---|---|---|
| Etching and post-process rinsing | Can carry process chemicals and constituents that require chemistry-specific control | pH adjustment, clarification, chemical precipitation, filtration and fluoride treatment |
| Cleaning and degreasing | May contain cleaning chemicals and organic compounds | Segregated collection and treatment selected for the contaminants present |
| Polishing, cutting and grinding | Can add particles and process residues to the water | Clarification and filtration, with additional treatment where required |
| UPW reject and rinse water | Often has lower contaminant concentrations than concentrated process waste, but its quality still determines whether recovery is practical | Reuse in later rinses, cooling towers or scrubbers in facility examples documented by EPA |
EPA’s 2022 study identifies fluoride, arsenic and organic compounds among pollutants associated with electrical and electronic component wastewater. The list is not a claim that every fab discharges each pollutant; actual constituents depend on chemicals, materials, equipment and operating conditions.
How treatment, reuse and discharge fit together
Step 1: Characterize each stream
Operators measure flow, pH, conductivity and the contaminants relevant to the process. Sampling and monitoring establish whether two streams can share a treatment stage or whether they need separate tanks, controls and permits.
Rank #3
- 【Great Compatibility】This Katerk 1/4 inch hex shank bit holder is specifically designed for 1/4 inch hex shank drill bits. It's compatible with most 1/4 fast hex handles, hex sockets, various electric screwdrivers, and handheld screwdrivers. The bit holder makes it a valuable addition for any handyman.
- 【Secure and Safe】Built with a secure backup nut design, each drill bit holder securely locks onto your bits, ensuring they stay firmly in place. Additionally, our bit holder incorporates a high-quality steel ball rolling design that holds up to several kilograms of weight, ensuring your various drill bits don't fall off.
- 【Easy One-Handed Operation】The bit holder for impact driver allows you to change bits single-handedly, simplifying your workflow. Its multi-color design further allows for quick identification of the drill bit you need.
- 【Compact and Convenient】Thanks to its compact size, this 1/4 inch bit holder is easy to carry around. The bit holder allows for easy attachment to various tools, making this a convenient addition to your construction accessories. The Katerk bit holder is cast from high-quality alloy material, promising a long product lifespan. Despite its rugged strength, the bit holder remains lightweight, making it portable.
- 【Cool Christmas Gift For Men Stocking Stuffers】 This screwdriver bit holder, driver bit holder, impact bit holder, can be given as a gift to your loved one, especially for anyone involved in construction or electrical work. It's a must-have for stocking stuffers for men and women, tools gifts for dad, tech gadgets for men, gifts for dad, gifts for him, gifts for husband, gifts for boyfriend, cool gadgets for men, and cool gifts for dad.
Step 2: Segregate compatible and incompatible flows
High-strength or chemistry-specific streams are kept apart from cleaner rinse water when that improves treatment, recovery or compliance. Stream segregation is a central design principle in SEMI F98 guidance because the reuse option depends on water quality and the intended application.
Step 3: Apply a treatment train matched to the contaminants
Facility examples reported to EPA include pH adjustment, clarification, chemical precipitation, filtration, fluoride treatment and specialized processes for particular contaminants. No single sequence applies to every fab. Treatment selection must account for incoming chemistry, target discharge limits, residuals, reliability and the quality needed for the next use.
Step 4: Send recovered water to an application that can accept its quality
SEMI F98 describes potential destinations for appropriately treated water: the front end of the UPW system, cooling systems, exhaust scrubbers, point-of-use abatement, thermal processes and site irrigation. EPA’s facility examples also include using rinse water in subsequent rinses, cooling towers or scrubbers. Reuse is therefore a matching exercise: the water must meet the receiving system’s quality and operational requirements, and the arrangement must comply with environmental rules.
Step 5: Treat and manage residuals
Purification and wastewater treatment do not make contaminants disappear. Concentrates, filter media, precipitated solids and other residuals require controlled handling and disposal or further processing. A project that lowers freshwater withdrawal but creates difficult residuals still needs a complete environmental evaluation.
Step 6: Discharge the remaining water under the applicable authorization
Reuse reduces the volume requiring discharge; it does not automatically produce zero liquid discharge. EPA’s 2022 study reported that industry contacts did not know of U.S. semiconductor facilities operating as zero-discharge plants at the time of that study.
Free tools Windows power users keep installed
One-click scans. No signup required.
Rank #4
- Long Nib and Deep Hole Marker: Our mechanical carpenter pencil with 45mm nib is designed for easy marking of deep holes or narrow areas. These construction pencils are the great choice for woodworking tools, construction tools, carpenter tools, contractor tools, wood carpentry tools and architect tools
- Extra Refills in 2 Colors for Versatile Marking: The construction mechanical pencil comes with 12 extra 2.8mm refills, including 6 red and 6 black refills. The black refill is suitable for light surfaces, while the red wax is perfect for dark surfaces. Our carpenter mechanical pencil makes sure that you'll have an ample supply for extended use
- Built-in Sharpener: Our construction pencil comes with a built-in sharpener to ensure the mechanical pencil tip is always sharp and ready for use. Never buy an extra pencil sharpener again. A great tool for any woodworker pencil, contractor pencils. The refill can easily be extended or retracted with a simple click of the pencils mechanical, allowing you to work more efficiently and accurately
- Portable Clip Design: Our deep hole construction pencil features a portable clip design, easy to carry and attach to your pocket or tool box, so that you can keep the carpenter pencils mechanical close at hand, making it a convenient tool to have on the go. Great gifts choice for carpenters
- Stronger Pencil Lead: The black refills are made of lead, sturdy and smooth. The red refills are made of wax, clear and light. These marking pencils are much thicker and stronger than normal pencils during the marking process of construction work, suitable for various surfaces, such as glasses, metal, boards, floors, walls, furniture, etc. The written marks can be easily wiped with a wet paper towel when needed
How much water do fabs recycle?
Recycling claims must identify the denominator, the date and the type of water being measured. The NIST assessment reports two different measures:
| Measure | Reported result | Qualification |
|---|---|---|
| Recycling of received water | 40% to 70% average as of 2022 | Reported for fabs using conventional onsite treatment; cited by NIST from IEEE (2023) |
| UPW recycling for process activities | More than 80% at several large manufacturers | Company or facility reports cited by NIST from Wang et al. (2023a, 2023b); this is not the same denominator as received-water recycling |
An UPW-process recycling rate above 80 percent can coexist with a lower percentage for all water received by the site because cooling, abatement, sanitation and other uses may follow different loops. Neither figure should be generalized to every fab.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Discharge permits and U.S. regulatory requirements
EPA’s electrical and electronic components rules
In the United States, EPA’s Electrical and Electronic Components (E&EC) effluent guidelines apply to direct dischargers that release wastewater to U.S. waters and to indirect dischargers that send it to publicly owned treatment works. The requirements are incorporated into permits or other control mechanisms. The rule framework covers wastewater associated with activities such as etching, cleaning, degreasing, cutting and grinding.
What the current EPA review says
EPA’s E&EC effluent-guideline page, updated March 17, 2026, says the agency’s detailed study found no demonstrated need to revise the existing regulation at that time. EPA also says the PFAS data it reviewed were limited and that it intends to continue monitoring discharges. That statement describes EPA’s review posture; it does not establish that every facility is free of PFAS or that other federal, state, local or pretreatment requirements are irrelevant.
Why a permit review is site-specific
A project team must determine whether a fab discharges directly, sends wastewater to a public treatment works, or uses a combination of routes. The receiving water or treatment works, local limits, monitoring obligations, pretreatment approval and chemical inventory can all affect the final permit conditions. U.S. requirements should not be presented as a worldwide standard: other jurisdictions impose their own rules.
Best Value
- Milwaukee Ink all Fine Point Marker, Black, 4 Per Pack
- 4 per pack Features Clog Resistant Marker Tip Writes through Dusty, Wet and Oily Surfaces Durable Marker Tip for Writing on Concrete, OSB and Rough Surfaces
- Clog resistant tip writes on dusty, wet and oily surfaces and is optimized for rough surfaces such as OSB, cinderblock and concrete
- Hard hat clip- attaches for easy access
- Quick dry time with reduced smearing and marking
Water risk depends on the watershed
The same withdrawal volume can have very different consequences in two locations. A basin with abundant seasonal flows and strong municipal infrastructure presents a different risk profile from a drought-prone basin where residents, farms and ecosystems already compete for limited supplies. The source and destination of water matter as much as the volume reused onsite.
SEMI’s October 2025 global assessment description says it analyzed 140 semiconductor production facilities across 89 water basins to establish a baseline of water-risk hotspots. The number of basins demonstrates why basin-level analysis is important; it does not mean that all 140 facilities face the same degree of risk.
NIST’s 2024 assessment, citing Wang et al. (2023a), reports that global semiconductor-industry water use increased 24.5 percent from 2019 to 2023. Industry growth can increase pressure on supplies unless fabs, utilities and regulators achieve additional reductions in withdrawals, consumption and discharges.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsEnvironmental impacts beyond water
Energy and chemical trade-offs
UPW production is energy- and cost-intensive because it uses multiple physical and chemical treatment steps. Higher reuse can reduce freshwater withdrawals, but recovery equipment also consumes energy, chemicals and maintenance resources and may produce concentrates or solids. The net benefit depends on the treatment route, source-water quality, reuse application and local electricity and waste-management conditions.
Fluorinated greenhouse-gas emissions
Water treatment does not control every important fab emission. EPA explains that fluorinated gases are used in plasma etching and in cleaning chemical-vapor-deposition chambers. EPA identifies process optimization, alternative input gases and destruction technologies as mitigation approaches and tracks facility-specific emissions through Greenhouse Gas Reporting Program Subpart I. These air-emission controls should be evaluated alongside, not substituted for, wastewater management.
Community and receiving-system effects
Discharge quality, temperature, flow timing and residual contaminants can affect a receiving stream or a public treatment works. A compliant discharge can still warrant watershed-level attention when several industrial users draw from or discharge to the same system. Community engagement and transparent reporting help identify supply, drought and infrastructure concerns that a plant-boundary recycling percentage cannot show.
How to compare two fabs or two reuse projects
Use the following questions before treating one recycling claim as better than another:
Quick Recap
- What is the water source and basin condition? Identify the utility or source arrangement, local water stress and competing users.
- What does the reported percentage measure? Distinguish withdrawal, consumption, internal recycling, UPW recycling and reclaimed-water supply.
- Which streams are segregated? Check whether concentrated process wastewater, cleaner rinses, UPW reject, cooling water and scrubber flows are managed separately.
- What treatment train is used? Look for the contaminant-specific stages, monitoring points, residual management and backup capacity.
- Where does recovered water go? Confirm the quality requirement for UPW feed, cooling, scrubbers, abatement, thermal processes or irrigation.
- Where does the remainder go? Identify the direct or indirect discharge route, permit limits and receiving system.
Design and construction checklist for a new or expanded fab
- Map every significant water use before sizing supply, storage and treatment equipment.
- Provide separate collection and equalization capacity for streams whose chemistry or contaminant load differs.
- Reserve sampling points that can verify influent, treated water, reuse water and final discharge quality.
- Design recovery systems around the quality required by the receiving application rather than pursuing one site-wide recycling number.
- Include reject water, concentrates, filter media, precipitated solids and other residuals in the waste-management plan.
- Confirm direct-discharge, pretreatment and local-permit requirements before finalizing pipe routing or treatment capacity.
- Evaluate drought, utility interruptions and source-water changes in redundancy and storage plans.
- Track water withdrawal, consumption, internal recycling and discharge as separate indicators.
- Coordinate wastewater planning with air-abatement and fluorinated-gas controls; one system does not replace the other.
- Report the measurement boundary, baseline year and operating conditions whenever a recycling result is published.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
