{"id":5968,"date":"2026-10-19T12:30:03","date_gmt":"2026-10-19T07:00:03","guid":{"rendered":"https:\/\/drinkprime.in\/blog\/?p=5968"},"modified":"2026-10-19T12:30:03","modified_gmt":"2026-10-19T07:00:03","slug":"ro-vs-uv-water-purifier-guide","status":"publish","type":"post","link":"https:\/\/drinkprime.in\/blog\/ro-vs-uv-water-purifier-guide\/","title":{"rendered":"RO or UV? How to Know What Your Water Needs"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div><div class=\"post-content\"><p><span style=\"font-weight: 400;\">Knowing what kind of purification technique your water needs is perhaps the most important step in your water purification journey.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The quality of your water depends on your city, your area and your water source. Regardless of the source of your water, it\u2019s imperative that you either rent or own a water purifier at home.<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/slack-imgs.com\/?c=1&amp;o1=ro&amp;url=https%3A%2F%2Fdrinkprime.in%2Fblog%2Fwp-content%2Fuploads%2F2025%2F10%2FBlog-Creatives-New.webp\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Read this detailed guide to know and understand what is in your water and what kind of purifier it demands.\u00a0<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_69_1 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #6e7191;color:#6e7191\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #6e7191;color:#6e7191\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/drinkprime.in\/blog\/ro-vs-uv-water-purifier-guide\/#What_is_actually_in_your_water\" title=\"What is actually in your water?\u00a0\">What is actually in your water?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/drinkprime.in\/blog\/ro-vs-uv-water-purifier-guide\/#What_RO_does_and_what_it_doesnt\" title=\"What RO does (and what it doesn\u2019t)\u00a0\">What RO does (and what it doesn\u2019t)\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/drinkprime.in\/blog\/ro-vs-uv-water-purifier-guide\/#The_TDS_question_who_needs_RO_who_may_not\" title=\"The TDS question: who needs RO, who may not?\u00a0\">The TDS question: who needs RO, who may not?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/drinkprime.in\/blog\/ro-vs-uv-water-purifier-guide\/#Conclusion\" title=\"Conclusion\">Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/drinkprime.in\/blog\/ro-vs-uv-water-purifier-guide\/#Frequently_Asked_Questions\" title=\"Frequently Asked Questions\">Frequently Asked Questions<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_actually_in_your_water\"><\/span><strong>What is actually in your water?\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Apart from essential minerals like calcium and magnesium, your water also contains a plethora of harmful chemicals, bacteria, heavy metals and other contaminants.\u00a0\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This also depends on the water source. Not every area\u2019s water has the same level of impurities. These impurities are measured as Total Dissolved Solids (TDS). TDS is the total amount of solid particles, such as salts, minerals, and metals, dissolved in your water. It is measured in ppm.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Your water\u2019s TDS only tells you \u2018how much\u2019 is dissolved, not \u2018what\u2019 is dissolved.\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_RO_does_and_what_it_doesnt\"><\/span><strong>What RO does (and what it doesn\u2019t)\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">In simple terms, RO stands for Reverse Osmosis. The purifiers have an RO membrane which <\/span><span style=\"font-weight: 400;\">uses high pressure to remove<\/span> <span style=\"font-weight: 400;\">TDS, impurities and contaminants.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">RO, however, does not remove gases like chlorine or sulphur which causes odour, for which a carbon filter is used in the purifiers.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><a href=\"https:\/\/drinkprime.in\/\">DrinkPrime\u2019s water purifiers<\/a> use RO to remove all the contaminants from drinking water. <\/span><span style=\"font-weight: 400;\">DrinkPrime&#8217;s purifiers, which you can rent, don\u2019t let part of your tap water skip RO to adjust TDS. They ensure every drop goes through 100% RO purification before adding essential minerals like calcium and magnesium.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Since RO also removes essential minerals like calcium and magnesium, DrinkPrime\u2019s purifiers add back these minerals to the treated water.\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_TDS_question_who_needs_RO_who_may_not\"><\/span><strong>The TDS question: who needs RO, who may not?\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Generally, RO is used for water with high TDS. For low TDS, ultraviolet (UV) may be enough. Let\u2019s break that down.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If your water has a high TDS, it usually affects taste and smell. High TDS also causes scaling problems in pipes or water containers. If the water tastes bitter, salty or has an unpleasant odour, there is a high chance your TDS could be higher than permissible standards.\u00a0<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td>TDS (ppm) level<\/td>\n<td>What does it mean for your water?<\/td>\n<\/tr>\n<tr>\n<td>0-200<\/td>\n<td>Your water is completely safe to drink<\/td>\n<\/tr>\n<tr>\n<td>201-500<\/td>\n<td>Your water is still acceptable, but the water\u2019s taste might be affected<\/td>\n<\/tr>\n<tr>\n<td>&gt;500<\/td>\n<td>Your water will taste salty and\/or bitter and needs purification<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-weight: 400;\">You can use a TDS meter to measure the level of TDS and if you don\u2019t have one, you can monitor the taste and smell of your water. If it tastes bitter or salty, your water needs to be purified. Even if the taste is fine, a purifier is still recommended, since TDS can\u2019t detect bacteria.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">As mentioned above, RO as a purification stage is generally used when TDS is more than 500 ppm. That said, water with a lower TDS may still need RO, depending on its source. You can choose between using an RO purifier and one with just a UV lamp.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">DrinkPrime offers a range of purifiers that cater to both scenarios. <a href=\"https:\/\/drinkprime.in\/products\/copper-water-purifier-on-rent\">The Copper<\/a>, <a href=\"https:\/\/drinkprime.in\/products\/alkaline-water-purifier-on-rent\">Alkaline<\/a>, <a href=\"https:\/\/drinkprime.in\/products\/mineral-water-purifier-on-rent\">Mineral+<\/a> and <a href=\"https:\/\/drinkprime.in\/products\/under-sink-water-purifier-on-rent\">Under the Sink<\/a> all combine an RO membrane with a UV lamp, while the UV model has only the UV lamp and no RO membrane. In the RO variants, the membrane removes heavy metals and the UV lamp neutralises bacteria and viruses.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">DrinkPrime\u2019s UV model has an 11-watt UV lamp, which is very effective at eliminating bacteria. It disinfects the water using ultraviolet light. A UV purifier is usually enough for low-TDS water because such water is assumed to have few contaminants for an RO membrane to remove.\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Conclusion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">So, <a href=\"https:\/\/drinkprime.in\/water-purifier-on-rent\">RO<\/a> or<a href=\"https:\/\/drinkprime.in\/products\/uv-water-purifier-on-rent\"> UV<\/a>? That depends on your water source and its TDS. RO works best if the water has contaminants like heavy metals, fluorides and nitrates. If your TDS is low and your main concern is bacteria and viruses, and you live in an area where the water source is known to be clean, then a UV purifier will cater to your needs.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">What\u2019s the first thing to do?\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Check your TDS level and then select a purifier according to your needs. You can also use DrinkPrime\u2019s website to check your area\u2019s TDS.\u00a0\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span><strong>Frequently Asked Questions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>1. What is TDS in water?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Total Dissolved Solids or TDS is the measure of impurities and contaminants present in your water. It could be heavy metals, bacteria, viruses etc. It is measured in ppm.\u00a0<\/span><\/p>\n<p><b>2. <\/b><strong>What is a good TDS level for drinking water?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Water with TDS up to 200 ppm is considered ideal. If the TDS is between 201 and 500 ppm, although considered safe, the taste may be affected. Above 500 ppm, it will taste salty or bitter and needs purification.<\/span><\/p>\n<p><b>3. How do I know if my water needs RO or UV, and does my water source matter?\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400;\">It depends on your water source and its TDS. Water quality varies by city, area and source (borewell, tanker, municipal supply), so the right purifier depends on what\u2019s actually in your water. Start by checking your water\u2019s TDS with a TDS meter. If the level is over 500 ppm, using a purifier with an RO membrane is recommended. If it is lower than that, and your main concern is bacteria and viruses, a UV purifier may be enough.\u00a0<\/span><\/p>\n<p><b>4. Can UV purification reduce TDS?<\/b><\/p>\n<p><span style=\"font-weight: 400;\">No. UV targets microorganisms like bacteria and viruses. It doesn\u2019t remove dissolved salts, heavy metals or other dissolved contaminants, which is what RO does.<\/span><\/p>\n<p><b>5. Does RO remove chlorine and bad smell?<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Not on its own. RO doesn\u2019t remove gases like chlorine, which is why purifiers use a carbon filter to take care of smell and chlorine.<\/span><\/p>\n<p><b>6. Does RO remove essential minerals from water?<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Yes, RO removes minerals like calcium and magnesium along with the impurities. DrinkPrime\u2019s purifiers add these essential minerals back after 100% RO purification.<\/span><\/p>\n<p><b>7. How can I check my water\u2019s TDS?<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Use a TDS meter. If you don\u2019t have one, you can monitor your water\u2019s taste and smell.\u00a0<\/span><\/p>\n<p><b>8. How often should I check my water\u2019s TDS?<\/b><\/p>\n<p><span style=\"font-weight: 400;\">It\u2019s a good idea to check whenever your water source changes, after the monsoon, or if you notice a change in taste or smell.\u00a0<\/span><\/p>\n<p><b>9. What happens if I use RO on water with low TDS?<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Using RO on already low-TDS water isn\u2019t harmful, but it may be unnecessary. RO removes dissolved minerals along with impurities, so low-TDS water can end up with even fewer essential minerals like calcium and magnesium. DrinkPrime\u2019s purifiers add these minerals back after RO purification, so the water stays balanced. If your TDS is low and your main concern is bacteria and viruses, a UV purifier may be enough.\u00a0<\/span><\/p>\n<p><b>10. Does DrinkPrime offer free technian visits as part of the rental plan?<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Yes, DrinkPrime\u2019s subscription plan includes free installation, delivery and relocation. The app also helps you check your purifier\u2019s health and your water consumtion. DrinkPrime also offers free technician visits whenever your purifier needs a filter change.\u00a0<\/span><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Knowing what kind of purification technique<a href=\"https:\/\/drinkprime.in\/blog\/ro-vs-uv-water-purifier-guide\/\">Read More<i class=\"fa fa-long-arrow-right\" aria-hidden=\"true\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":2727,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-5968","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-water-purifier"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>RO or UV? How to Know What Your Water Needs - drinkprime.in<\/title>\n<meta name=\"description\" content=\"RO or UV water purifier? 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