{"id":624,"date":"2026-10-23T10:27:28","date_gmt":"2026-10-23T02:27:28","guid":{"rendered":"http:\/\/www.deepviharschool.com\/blog\/?p=624"},"modified":"2026-10-23T10:27:28","modified_gmt":"2026-10-23T02:27:28","slug":"what-are-the-reclaimed-water-quality-standards-that-edi-equipment-can-meet-44be-0d4a83","status":"publish","type":"post","link":"http:\/\/www.deepviharschool.com\/blog\/2026\/10\/23\/what-are-the-reclaimed-water-quality-standards-that-edi-equipment-can-meet-44be-0d4a83\/","title":{"rendered":"What are the reclaimed water quality standards that EDI equipment can meet?"},"content":{"rendered":"

Hey there, if you\u2019re deep in the water treatment game, you\u2019ve definitely heard of EDI (Electrodeionization) \u2014 right now, I\u2019m wrapping up day three of troubleshooting a customer\u2019s old RO setup that kept crashing because they skipped pairing it with solid EDI gear. This customer\u2019s been asking nonstop: \u201cWhat kind of reclaimed water standards can our EDI equipment actually hit?\u201d Let\u2019s break this down, no fancy textbook jargon, just the real stuff we talk about with our clients every day. EDI Equipment<\/a><\/p>\n

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First off, let\u2019s get one thing straight: reclaimed water isn\u2019t just \u201cused water\u201d \u2014 it\u2019s wastewater that\u2019s been cleaned up enough to reuse, and the quality depends entirely on what it\u2019s going to be used for. EDI\u2019s whole superpower here is that it polishes reverse osmosis (RO) permeate way better than old mixed-bed ion resins, no messy chemical regeneration. Now, what standards can our EDI gear nail? Let\u2019s run through the big ones that our team sees clients asking about every single week.<\/p>\n

First, there\u2019s potable reuse \u2014 that\u2019s water that\u2019s safe to drink, either direct or indirect (like putting it back into aquifers or reservoirs). Most places have tight rules for this: the EPA\u2019s Groundwater Replenishment Rule, California\u2019s Title 22, maybe ISO 21001 for drinking water systems. Our EDI equipment\u2019s not just hitting the conductivity marks here \u2014 we\u2019re talking resistivity consistently above 18.2 M\u03a9\u00b7cm at 25\u00b0C, which is the gold standard for pure water. Wait, conductivity is the opposite of resistivity, right? So that means less than 0.055 \u00b5S\/cm. But for potable use, we go way beyond that. We\u2019re stripping out dissolved salts like sodium, chloride, and even trace heavy metals (like lead or arsenic) down to parts per billion (ppb) levels. And the best part? EDI doesn\u2019t use those harsh acids and bases that can leave behind residual chemicals, so the water\u2019s clean enough for drinking straight or blending into municipal supplies. We\u2019ve got a food and beverage client that uses our EDI for their bottled water line \u2014 they switched from another brand\u2019s EDI because ours kept hitting their TOC (total organic carbon) limit of less than 50 ppb, no issues even when their feedwater had a weird spike from a nearby storm drain runoff.<\/p>\n

Next up, industrial reuse. This is the bread and butter for our EDI sales \u2014 think power plant boiler feedwater, semiconductor manufacturing, even pharmaceutical process water. Power plants need super pure water to prevent scaling and corrosion in their boilers. The standard here is usually ASTM D4519 for boiler water, which requires resistivity above 15 M\u03a9\u00b7cm at minimum, but most modern plants go for 18+ M\u03a9\u00b7cm. Semiconductors? They\u2019re even crazier \u2014 they need water so pure there\u2019s almost no dissolved ions, because a single particle in the water can ruin a $10,000 silicon wafer. Our EDI paired with a decent RO pre-treatment hits that 18.2 M\u03a9\u00b7cm mark, and we work with our clients to adjust the cell stacks if they need extra polishing for ultra-pure water (UPW) for microchip production. We had a semiconductor startup last year that was using a homemade RO-resin setup that kept having resin leaks, leading to wafer defects. They got our EDI, and within two months, their defect rate dropped by 70% \u2014 that\u2019s the kind of win we live for. Also, industrial facilities might reuse water for cooling towers too \u2014 EDI can treat the RO permeate to cut down on scale-causing minerals, so they don\u2019t have to dump as much water and make up new. That\u2019s a cost saver, big time.<\/p>\n

Then there\u2019s non-potable reuse, which is huge for municipalities and even golf courses or industrial sites that don\u2019t need drinkable water. This includes things like irrigation, toilet flushing, or even dust control for construction sites. The standards here are way more lenient than potable, like the EPA\u2019s guidelines for non-potable reuse or local regulations for agricultural irrigation (FAO has standards for that too). Our EDI can easily hit the limits here \u2014 TDS (total dissolved solids) under 500 mg\/L, no harmful pathogens (though we usually pair EDI with UV or membrane filtration for that), and low levels of nitrates or phosphates so they don\u2019t mess with plants or soil. A local golf course here used to pay a fortune for municipal water, and they got our EDI to treat nearby wastewater for irrigation. They told us last quarter they cut their water bill by 45% \u2014 that\u2019s money they can spend on better course maintenance instead of water.<\/p>\n

Wait, I should mention that EDI doesn\u2019t work alone, right? It\u2019s part of a whole system \u2014 pre-treatment (usually RO, sometimes ultrafiltration) is key. If your feedwater has a ton of suspended solids or organics, EDI can get fouled, so the quality drops. But when paired right, our EDI\u2019s consistent. I\u2019ve seen clients try to skip pre-treatment and then come back complaining their EDI isn\u2019t hitting standards \u2014 that\u2019s on us sometimes for not being clear, but we always do a free system audit for potential clients to make sure we set them up right.<\/p>\n

Now, let\u2019s get specific on the numbers, because that\u2019s what matters. Let\u2019s compare our EDI\u2019s performance to common standards:<\/p>\n