{"id":1536,"date":"2013-11-25T10:25:37","date_gmt":"2013-11-25T18:25:37","guid":{"rendered":"http:\/\/support.cleanwaterstore.com\/blog\/?p=1536"},"modified":"2026-08-22T13:36:58","modified_gmt":"2026-08-22T20:36:58","slug":"using-alum-and-mangox-to-treat-turbidity","status":"publish","type":"post","link":"https:\/\/www.cleanwaterstore.com\/blog\/using-alum-and-mangox-to-treat-turbidity\/","title":{"rendered":"Using Alum and Pro-OX Filter Media to Treat Turbidity"},"content":{"rendered":"<p><a href=\"https:\/\/support.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/11\/shutterstock_105072083.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1538\" src=\"https:\/\/support.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/11\/shutterstock_105072083.jpg\" alt=\"shutterstock_105072083\" width=\"600\" height=\"275\" data-id=\"1538\" srcset=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/11\/shutterstock_105072083.jpg 1000w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/11\/shutterstock_105072083-300x137.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p>In a previous blog post, we explored how to treat turbidity without using chemical injection. Recently, a reader reached out with a follow-up question: Can alum injection and a <a href=\"https:\/\/www.cleanwaterstore.com\/search-results.html?Search=Pro-OX+iron+filter\">Pro-OX iron filter<\/a> effectively treat water turbidity?<\/p>\n<p>The answer is yes, you can certainly treat cloudy water by injecting alum and filtering with a Pro-OX filter. \u00a0As we mentioned in our last post on the topic, alum is probably the most popular method of treating turbidity. \u00a0In fact, it\u2019s probably used by your municipal treatment center to treat turbidity in your local water supply. Turbidity is typically measured using specialized instruments such as a turbidity meter or turbidity sensor, which analyze a liquid sample to determine the amount of light scattered by suspended particles.<\/p>\n<h2>What Is Alum and How Does It Work?<\/h2>\n<p>For the uninitiated, alum is a chemical compound that, when introduced to water, stimulates flocculation (the process by which small particulate clumps together to form a larger mass) in the turbidity-causing organic matter and other colloidal solids, making them much more easily filterable. Alum helps remove particulate matter, suspended sediment, total suspended solids, and even solid waste from water.<\/p>\n<p>We recommend using a contact tank when injecting alum, as this will ensure proper contact time between the water and alum and stimulate flocculation by mildly agitating the mixture. Proper mixing ensures heavier particles and higher concentrations of suspended solids can settle out, improving the effectiveness of the treatment process.<\/p>\n<h2>Choosing the Right Filter After Alum Injection<\/h2>\n<p>After the contact tank, you could use either a Pro-OX filter or a sediment backwash filter to remove the flocculated turbidity particles.<\/p>\n<p>We recommend the Pro-OX filter if your water is high in iron and manganese as well as turbidity; if not, a Chemsorb Sediment Backwash Filter will be just as effective. These filters are effective at reducing turbidity readings and achieving low turbidity, resulting in more transparent water suitable for drinking water applications.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.cleanwaterstore.com\/search-results.html?Search=Pro-OX+iron+filter\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-12021\" src=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/10\/iron_water_system_5900.jpg\" alt=\"Pro-OX 5900 Iron Filter system with digital control valve and durable tank, designed to remove iron, manganese, and odors from well water.\" width=\"500\" height=\"500\" data-id=\"12021\" srcset=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/10\/iron_water_system_5900.jpg 1000w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/10\/iron_water_system_5900-300x300.jpg 300w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/10\/iron_water_system_5900-150x150.jpg 150w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/10\/iron_water_system_5900-768x768.jpg 768w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/10\/iron_water_system_5900-400x400.jpg 400w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/10\/iron_water_system_5900-500x500.jpg 500w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/10\/iron_water_system_5900-120x120.jpg 120w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>Stormwater retention ponds and silt fences are also used in some settings to reduce the amount of loose dirt and other pollutants entering a body of water from surrounding land.<\/p>\n<p>Some people use both systems to treat turbidity \u2013 if you choose to use both systems, be sure to install the sediment backwash filter before the iron filter. This approach is especially useful in areas with high water flow or where water flows can increase turbidity by resuspending particulate matter.<\/p>\n<h2>Alternatives to Alum Injection for Turbidity Control<\/h2>\n<p>You can also treat cloudy water without injecting any chemicals with a reverse osmosis or ultra-filtration system, or by using a cartridge filter before your sediment backwash filter, though this latter option is not quite as effective as the others mentioned here. Reverse osmosis and ultra-filtration systems are commonly used in industrial processes and for treating surface water to remove dissolved solids, microscopic organisms, and potential pollution.<\/p>\n<p>Also, note that both ultrafiltration and reverse osmosis systems require a pre-filter to preserve the integrity of their UF\/RO membranes. Consider using an alum injector and sediment backwash filter, followed by a UF or RO system, for maximum effectiveness. Pre-filtration helps protect fish habitats and spawning beds by reducing habitat quality degradation caused by turbid water and algal blooms.<\/p>\n<h2>Introduction to Water Quality<\/h2>\n<p>Water quality is essential for healthy ecosystems and aquatic life. One key indicator of water quality is turbidity. Turbidity refers to how clear or cloudy water appears due to suspended solids. Measuring turbidity helps assess water clarity and the amount of material present. High turbidity can harm aquatic organisms by blocking light and disturbing the natural balance. Regular testing offers insights into water health and helps protect both aquatic life and the environment.<\/p>\n<h2>Effects of Turbidity<\/h2>\n<p>High turbidity levels can harm aquatic life and ecosystems. Suspended particles block sunlight, reducing photosynthesis in aquatic plants. Less plant growth leads to lower oxygen levels, which makes survival harder for fish and other organisms. Turbidity also raises the risk of waterborne diseases, as particles may carry harmful pathogens. Monitoring turbidity helps identify problem areas and allows action to improve water quality and reduce health risks.<\/p>\n<h2>Measuring Turbidity<\/h2>\n<p>Turbidity measurement is an important part of water quality testing. Turbidity meters, or nephelometers, work by shining a light through water and measuring how much is scattered by particles. More particles mean more scattered light and higher turbidity. Readings are given in NTU (nephelometric turbidity units) or JTU (Jackson turbidity units). Consistent testing helps track changes, spot pollution, and prevent problems before they grow worse.<\/p>\n<h2>Causes of Turbidity<\/h2>\n<p>Many natural and human-related factors cause turbidity. Sediments like silt and clay often enter water through erosion or construction. Loose soil can wash into streams during storms. Algal blooms, fed by excess nutrients, also raise turbidity by adding organic matter. Urban runoff carries pollutants from roads and buildings into waterways. Knowing these causes helps guide efforts to reduce turbidity and protect water quality.<\/p>\n<h2>Using Alum as a Coagulant<\/h2>\n<p>Alum, or aluminum sulfate, is often used to treat turbidity. When added to water, alum causes particles to clump together into larger masses. These clumps are easier to remove through filtration or settling. Alum improves water clarity and safety for people and aquatic life. However, overdosing with aluminum can raise aluminum levels, which may harm the environment. When used correctly, alum is a reliable way to reduce turbidity and maintain clean water.<\/p>\n<h2>Other Ways to Treat Turbidity<\/h2>\n<p>Some people use both sediment and iron filters together. If you do, install the sediment backwash filter first.<\/p>\n<p>You can also treat cloudy water without using chemicals. Reverse osmosis and ultrafiltration systems both work well. A cartridge filter before a backwash filter may help, though it\u2019s less effective.<\/p>\n<p>Reverse osmosis (RO) and ultrafiltration (UF) systems need a pre-filter to protect their membranes. For best results, use an alum injector and sediment backwash filter before your UF or RO system.<\/p>\n<h2>Frequently Asked Questions (FAQs)<\/h2>\n<h3>1. What is water turbidity?<\/h3>\n<p>Water turbidity refers to how cloudy or murky water appears due to suspended particles like silt, clay, algae, or organic matter. It\u2019s a key indicator of water quality.<\/p>\n<h3>2. What causes turbidity in water?<\/h3>\n<p>Common causes include soil erosion, stormwater runoff, wastewater discharge, algae blooms, and disturbances in riverbeds or reservoirs.<\/p>\n<h3>3. Why is high turbidity a problem?<\/h3>\n<p>High turbidity can block sunlight, reduce oxygen levels, harm aquatic life, and make it harder to disinfect water for safe use.<\/p>\n<h3>4. How is turbidity measured?<\/h3>\n<p>Turbidity is measured using a turbidity meter or nephelometer, which detects how much light is scattered by particles in the water. The results are reported in NTU (Nephelometric Turbidity Units).<\/p>\n<h3>5. What is an acceptable turbidity level for drinking water?<\/h3>\n<p>Under the EPA&#8217;s Surface Water Treatment Rule, public water systems using surface water must keep turbidity below 1 NTU, with 0.3 NTU or lower as the treatment target. This is a public-system compliance standard, not a private well requirement \u2014 but it is a reasonable clarity goal to aim for.<\/p>\n<h3>6. Can I see turbidity with the naked eye?<\/h3>\n<p>In many cases, yes. Cloudy or discolored water is a visual sign of turbidity, but low levels may require testing to detect.<\/p>\n<h3>7. How do you treat water turbidity at home?<\/h3>\n<p>Home treatment options include sediment filters, cartridge filters, alum injection, and systems like reverse osmosis or ultrafiltration.<\/p>\n<h3>8. Does boiling water remove turbidity?<\/h3>\n<p>Boiling can kill microbes, but doesn\u2019t remove suspended solids. You\u2019ll need proper filtration to reduce turbidity.<\/p>\n<h3>9. Is turbid water safe for fish and plants?<\/h3>\n<p>High turbidity can harm fish by clogging gills and reducing oxygen. It also limits sunlight for aquatic plants, disrupting ecosystems.<\/p>\n<h3>10. How often should I test for turbidity in well or surface water?<\/h3>\n<p>Test regularly\u2014at least once a year for wells, or more often after storms, flooding, or visible changes in water clarity.<\/p>\n<p><a href=\"https:\/\/go.appointmentcore.com\/book\/eZeZdVQj\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-13741 aligncenter\" src=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/05\/call-request-cta-1.jpg\" alt=\"Blue banner with a phone icon and text: \u201cRequest a Free Call \u2013 1-888-600-5426. Would you like more information about our water treatment systems? Or schedule a free call: Book Now.\" width=\"1024\" height=\"160\" data-id=\"13741\" srcset=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/05\/call-request-cta-1.jpg 1024w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/05\/call-request-cta-1-300x47.jpg 300w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/05\/call-request-cta-1-768x120.jpg 768w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/05\/call-request-cta-1-400x63.jpg 400w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/05\/call-request-cta-1-500x78.jpg 500w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In a previous blog post, we explored how to treat turbidity without using chemical injection. Recently, a reader reached out with a follow-up question: Can alum injection and a Pro-OX iron filter effectively treat water turbidity? The answer is yes, you can certainly treat cloudy water by injecting alum and filtering with a Pro-OX filter. &hellip; <a href=\"https:\/\/www.cleanwaterstore.com\/blog\/using-alum-and-mangox-to-treat-turbidity\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Using Alum and Pro-OX Filter Media to Treat Turbidity<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":1538,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[36,17,39,35,60,27,4],"tags":[98,23,97,61,66,63,322],"class_list":["post-1536","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-installing-water-treatment-systems","category-iron-filters","category-reverse-osmosis","category-sediment","category-ultrafiltration","category-water-purification","category-well-water-treatment","tag-alum","tag-iron-filter","tag-mangox","tag-reverse-osmosis-2","tag-sediment-backwash-filter","tag-turbidity","tag-ultrafiltration"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.6 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Using Alum and MangOX to Treat Water Turbidity<\/title>\n<meta name=\"description\" content=\"Read about how Aluminum and Manganese Oxide can treat water turbidity. We have several water treatment products to choose from.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cleanwaterstore.com\/blog\/using-alum-and-mangox-to-treat-turbidity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Using Alum and Pro-OX Filter Media to Treat Turbidity Using Alum and Pro-OX Filter Media to Treat Turbidity - Clean Water Store\" \/>\n<meta property=\"og:description\" content=\"In a previous blog post, we explored how to treat turbidity without using chemical injection. Recently, a reader reached out with a follow-up question: Clean, Safe Water Solutions from Clean Water Store.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cleanwaterstore.com\/blog\/using-alum-and-mangox-to-treat-turbidity\/\" \/>\n<meta property=\"og:site_name\" content=\"The Clean Well Water Report\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/cleanwaterstore\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/cleanwaterstore\" \/>\n<meta property=\"article:published_time\" content=\"2013-11-25T18:25:37+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-22T20:36:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2013\/11\/shutterstock_105072083.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"459\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Gerry Bulfin\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Gerry Bulfin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/using-alum-and-mangox-to-treat-turbidity\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/using-alum-and-mangox-to-treat-turbidity\\\/\"},\"author\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/#gerry\"},\"headline\":\"Using Alum and Pro-OX Filter Media to Treat Turbidity\",\"datePublished\":\"2013-11-25T18:25:37+00:00\",\"dateModified\":\"2026-08-22T20:36:58+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/using-alum-and-mangox-to-treat-turbidity\\\/\"},\"wordCount\":1302,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/using-alum-and-mangox-to-treat-turbidity\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/wp-content\\\/uploads\\\/2013\\\/11\\\/shutterstock_105072083.jpg\",\"keywords\":[\"alum\",\"iron filter\",\"mangox\",\"reverse osmosis\",\"sediment backwash filter\",\"turbidity\",\"ultrafiltration\"],\"articleSection\":[\"Installing Water Treatment Systems\",\"Iron Filters\",\"Reverse Osmosis\",\"Sediment\",\"Ultrafiltration\",\"Water Purification\",\"Well Water Treatment\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/using-alum-and-mangox-to-treat-turbidity\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/using-alum-and-mangox-to-treat-turbidity\\\/\",\"url\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/using-alum-and-mangox-to-treat-turbidity\\\/\",\"name\":\"Using Alum and MangOX to Treat Water Turbidity\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/using-alum-and-mangox-to-treat-turbidity\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/using-alum-and-mangox-to-treat-turbidity\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/wp-content\\\/uploads\\\/2013\\\/11\\\/shutterstock_105072083.jpg\",\"datePublished\":\"2013-11-25T18:25:37+00:00\",\"dateModified\":\"2026-08-22T20:36:58+00:00\",\"description\":\"Read about how Aluminum and Manganese Oxide can treat water turbidity. 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