{"id":16937,"date":"2026-05-26T12:31:02","date_gmt":"2026-05-26T19:31:02","guid":{"rendered":"https:\/\/www.cleanwaterstore.com\/blog\/?p=16937"},"modified":"2026-10-11T15:42:39","modified_gmt":"2026-10-11T22:42:39","slug":"stop-rust-stains-sprinklers-well-water","status":"publish","type":"post","link":"https:\/\/www.cleanwaterstore.com\/blog\/stop-rust-stains-sprinklers-well-water\/","title":{"rendered":"How to Stop Rust Stains from Sprinklers for Good (Well Water Guide)"},"content":{"rendered":"<p>If your sprinklers are leaving orange or brown stains on your fence, driveway, siding, or concrete, you&#8217;ve probably already tried scrubbing them off. Maybe more than once. The frustrating truth: cleaning the stains does nothing to prevent new ones. Until you treat the water causing them, the stains will keep coming back \u2014 every single watering cycle.<\/p>\n<p>In this guide, Gerry from Clean Water Store walks you through exactly what&#8217;s causing those stains and, more importantly, how to stop them permanently. We also cover the two main treatment approaches \u2014 polyphosphate injection and iron filtration \u2014 so you can choose the right solution for your situation.<\/p>\n<hr \/>\n<h2>Watch: How to Stop Rust Stains from Your Sprinklers for Good<\/h2>\n<p>Gerry breaks down the full picture in this short video \u2014 why your water looks clear but still stains, how dissolved iron behaves when it hits air, and when each treatment approach makes sense for your irrigation setup:<\/p>\n<div style=\"text-align: center;\">\n<p><iframe loading=\"lazy\" title=\"Stop Rust Stains from Your Sprinklers (For Good)\" width=\"660\" height=\"371\" src=\"https:\/\/www.youtube.com\/embed\/aSZefIltmjA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<\/div>\n<p>Keep reading for a deeper dive into everything covered in the video, plus additional detail on sizing, treatment options, and what to do first.<\/p>\n<hr \/>\n<h2>Why Is My Well Water Leaving Rust Stains on Everything?<\/h2>\n<p>Here&#8217;s the thing most homeowners don&#8217;t realize: your water can look perfectly clear coming out of the tap and still be loaded with iron. This is called <strong>ferrous iron<\/strong> \u2014 dissolved iron that&#8217;s invisible in water but oxidizes the moment it&#8217;s exposed to air. When your sprinklers spray that water across your fence, concrete, or siding, the iron reacts with oxygen and converts to ferric iron \u2014 rust \u2014 right on the surface.<\/p>\n<p>That&#8217;s why scrubbing doesn&#8217;t work. You&#8217;re removing the rust that&#8217;s already there, but the next watering cycle deposits more. The only fix is treating the water before it hits your sprinklers.<\/p>\n<p>According to <a href=\"https:\/\/njaes.rutgers.edu\/fs516\/\" target=\"_blank\" rel=\"noopener\">Rutgers University Extension<\/a>, irrigation water with iron levels above just 0.3 ppm can cause rust staining and discoloration on surfaces \u2014 a level that&#8217;s extremely common in private wells.<\/p>\n<h3>Q: My water looks completely clear. How can it have iron in it?<\/h3>\n<p>Clear water iron (ferrous iron) is dissolved and invisible until it&#8217;s exposed to oxygen. When your well water is under pressure in pipes, the iron stays dissolved. The moment it&#8217;s sprayed through a sprinkler \u2014 exposed to air \u2014 it oxidizes and turns into the orange rust you&#8217;re seeing. <a href=\"https:\/\/www.cleanwaterstore.com\/water-testing.html\">A simple water test<\/a> will tell you exactly how much iron is in your water. You can&#8217;t tell by looking.<\/p>\n<figure id=\"attachment_15719\" aria-describedby=\"caption-attachment-15719\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-15719\" src=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/10\/378A7990-Recovered-e1770054242594.jpg\" alt=\"A photo showing untreated water, oxidized iron in water and treated water.\" width=\"500\" height=\"299\" data-id=\"15719\" srcset=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/10\/378A7990-Recovered-e1770054242594.jpg 1657w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/10\/378A7990-Recovered-e1770054242594-300x179.jpg 300w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/10\/378A7990-Recovered-e1770054242594-1024x612.jpg 1024w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/10\/378A7990-Recovered-e1770054242594-768x459.jpg 768w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/10\/378A7990-Recovered-e1770054242594-400x239.jpg 400w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/10\/378A7990-Recovered-e1770054242594-500x299.jpg 500w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/10\/378A7990-Recovered-e1770054242594-1536x918.jpg 1536w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><figcaption id=\"caption-attachment-15719\" class=\"wp-caption-text\">From left to right: untreated water, oxidized iron in water and treated water.<\/figcaption><\/figure>\n<h3>Q: Could the stains be coming from my pipes, not my well water?<\/h3>\n<p>Possibly, but less likely if you&#8217;re seeing stains primarily on outdoor surfaces hit by sprinkler spray. Pipe corrosion tends to show up as rust-colored water or staining around indoor fixtures. If the staining is concentrated on surfaces your sprinklers hit \u2014 fences, siding, walkways \u2014 the iron is almost certainly coming from your well water, not your pipes. A water test at the source will confirm it either way. <a href=\"https:\/\/www.cleanwaterstore.com\/blog\/ultimate-guide-water-testing\/\">Here&#8217;s how to test your well water properly.<\/a><\/p>\n<hr \/>\n<h2>Why Is the Irrigation Line the Problem \u2014 Even If You Already Have a Water Filter?<\/h2>\n<p>This surprises a lot of homeowners. If you already have an iron filter or whole house treatment system installed, you might wonder why your sprinklers are still staining.<\/p>\n<p>The answer: most irrigation lines are plumbed <em>before<\/em> or <em>around<\/em> the treatment system. This is done intentionally \u2014 treating the large volumes of water used for irrigation through a standard residential iron filter would overload the system, exhaust the media much faster, and require far more frequent backwashing. So the irrigation line bypasses the treatment and gets raw, untreated well water directly.<\/p>\n<p>This means even homeowners with a whole house iron filter can have rust staining problems on their lawn and landscaping \u2014 because the outdoor water was never treated to begin with.<\/p>\n<h3>Q: Can I just run my irrigation water through my existing whole house iron filter?<\/h3>\n<p>In most cases, no \u2014 or at least not without consequences. Irrigation systems can move thousands of gallons of water per watering cycle. A residential iron filter sized for household use (typically 8\u201312 GPM service flow) is not designed to handle that volume continuously. Running irrigation through it would deplete the filter media rapidly and prevent proper backwashing. The better approach is a dedicated irrigation treatment solution \u2014 either a polyphosphate injection system or a larger iron filter specifically sized for your irrigation flow rate.<\/p>\n<hr \/>\n<h2>What Are the Two Main Solutions for Irrigation Rust Stains?<\/h2>\n<p>There are two fundamentally different approaches. Understanding the difference helps you choose the right one for your situation.<\/p>\n<h3>Option 1: Polyphosphate Injection<\/h3>\n<p>Polyphosphate injection is a chemical sequestration method. A small dosing pump injects polyphosphate solution into your irrigation line ahead of the sprinklers. The polyphosphate binds to iron molecules and keeps them in solution \u2014 so when the water is sprayed, the iron doesn&#8217;t precipitate out as rust on contact with air.<\/p>\n<p><a href=\"https:\/\/www.cleanwaterstore.com\/phosphate-crystal-feeders\/phosphate-system-including-one-phosphate-cartridge-34.html\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-16945\" src=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/05\/phosphate_system.png\" alt=\"Phosphate system for rust and iron \" width=\"358\" height=\"450\" data-id=\"16945\" srcset=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/05\/phosphate_system.png 974w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/05\/phosphate_system-238x300.png 238w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/05\/phosphate_system-814x1024.png 814w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/05\/phosphate_system-768x967.png 768w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/05\/phosphate_system-400x503.png 400w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/05\/phosphate_system-500x629.png 500w\" sizes=\"auto, (max-width: 358px) 100vw, 358px\" \/><\/a><\/p>\n<p><strong>The pros:<\/strong><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul style=\"list-style-type: circle;\">\n<li>Lower upfront cost and simpler installation<\/li>\n<li>Works well for moderate iron levels<\/li>\n<li>No large filter tank required<\/li>\n<li>Good option when irrigation volumes are very high and iron levels are moderate<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>The limitations:<\/strong><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul style=\"list-style-type: circle;\">\n<li>Does not remove iron from the water \u2014 it just keeps it from staining. The iron is still there.<\/li>\n<li>Ongoing chemical cost \u2014 you&#8217;re continuously buying and refilling polyphosphate solution<\/li>\n<li>Can leave a slight residue as water evaporates on very hot days<\/li>\n<li>Not effective for very high iron levels or iron bacteria<\/li>\n<li>Does not address iron clogging of drip irrigation emitters<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Polyphosphate keeps iron in solution so it doesn&#8217;t produce stains \u2014 but it&#8217;s not perfect, and evaporation can still leave an iron residue in some conditions.<\/p>\n<h3>Q: Is polyphosphate safe for plants and lawn?<\/h3>\n<p>Yes, polyphosphate is generally considered safe for plants and soil at normal dosing levels. However, overdosing can make water feel slippery and may cause gastrointestinal upset if the water is consumed at high concentrations. Always follow the manufacturer&#8217;s dosing guidelines and use a properly sized injection pump calibrated to your water flow.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-12804\" src=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/04\/hose_water.jpg\" alt=\"Water flowing from a hose onto green grass, representing the importance of clean, accessible water sources in maintaining livestock water quality on farms.\" width=\"500\" height=\"333\" data-id=\"12804\" srcset=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/04\/hose_water.jpg 600w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/04\/hose_water-300x200.jpg 300w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/04\/hose_water-400x267.jpg 400w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/04\/hose_water-500x333.jpg 500w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<h3>Option 2: Iron Filtration for Irrigation<\/h3>\n<p>An iron filter dedicated to your irrigation line removes the iron from the water before it reaches your sprinklers \u2014 permanently and completely. Unlike polyphosphate, there are no ongoing chemicals to buy and no iron left in the water at all.<\/p>\n<p>The key difference from a household iron filter is sizing. Irrigation systems require much higher flow rates \u2014 often 20\u201350 GPM depending on the number of zones \u2014 and run for extended periods. An irrigation iron filter must be sized for your peak irrigation flow rate, not your household demand.<\/p>\n<p><strong>The pros:<\/strong><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul style=\"list-style-type: circle;\">\n<li>Permanently removes iron \u2014 no staining, no chemicals, no ongoing cost<\/li>\n<li>Protects drip emitters and sprinkler heads from clogging<\/li>\n<li>No ongoing chemical purchases<\/li>\n<li>Better for high iron levels (above 3\u20135 PPM)<\/li>\n<li>Also removes manganese and sediment<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>The considerations:<\/strong><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul style=\"list-style-type: circle;\">\n<li>Higher upfront cost than polyphosphate, especially for large irrigation systems<\/li>\n<li>Requires proper sizing to your irrigation flow rate \u2014 undersizing leads to poor performance<\/li>\n<li>Needs a backwash cycle, which must be scheduled when irrigation is not running<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Q: Can an iron filter handle the flow rate my irrigation system needs?<\/h3>\n<p>Yes \u2014 but sizing is critical. Residential irrigation systems vary widely in flow demand. To size correctly, you need to know your peak irrigation flow rate in GPM (typically measured at the irrigation valve or controller) and your iron level from a water test. With those two numbers, our water specialists can size the right system for your setup.<\/p>\n<hr \/>\n<h2>Polyphosphate vs Iron Filter: Which Is Right for Your Irrigation Setup?<\/h2>\n<table>\n<thead>\n<tr>\n<th><\/th>\n<th>Polyphosphate Injection<\/th>\n<th>Iron Filter<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Removes iron?<\/strong><\/td>\n<td>No \u2014 sequesters it<\/td>\n<td>Yes \u2014 fully removed<\/td>\n<\/tr>\n<tr>\n<td><strong>Stops staining?<\/strong><\/td>\n<td>Mostly \u2014 may leave slight residue<\/td>\n<td>Yes \u2014 completely<\/td>\n<\/tr>\n<tr>\n<td><strong>Ongoing cost?<\/strong><\/td>\n<td>Yes \u2014 chemical refills<\/td>\n<td>Minimal \u2014 occasional media replacement<\/td>\n<\/tr>\n<tr>\n<td><strong>Best for iron level<\/strong><\/td>\n<td>Moderate (&lt;3 PPM)<\/td>\n<td>Any level<\/td>\n<\/tr>\n<tr>\n<td><strong>Iron bacteria?<\/strong><\/td>\n<td>Not effective<\/td>\n<td>With chlorination upstream<\/td>\n<\/tr>\n<tr>\n<td><strong>Protects drip emitters?<\/strong><\/td>\n<td>Partially<\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<td><strong>Upfront cost<\/strong><\/td>\n<td>Lower<\/td>\n<td>Higher<\/td>\n<\/tr>\n<tr>\n<td><strong>Long-term cost<\/strong><\/td>\n<td>Higher (ongoing chemicals)<\/td>\n<td>Lower<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em>Bottom line: polyphosphate is a practical short-term or budget solution for moderate iron. An iron filter is the permanent fix \u2014 especially for higher iron levels, iron bacteria, or drip irrigation systems where clogging is a concern.<\/em><\/p>\n<hr \/>\n<h2>What About Iron Bacteria in Irrigation Water?<\/h2>\n<p>Iron bacteria are a separate problem from dissolved iron \u2014 and a more difficult one. These microorganisms feed on iron and form a reddish-brown slime in toilet tanks, around irrigation fittings, and inside pipes. If you&#8217;re seeing slimy orange or brown buildup (not just staining) in your irrigation system, iron bacteria may be involved.<\/p>\n<p><a href=\"https:\/\/www.cleanwaterstore.com\/well-water-chlorination-systems.html\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-16697\" src=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/03\/jpro_38_chlorination_well_water_system.png\" alt=\"Chlorination system for well water with a J-Pro-38 meter\" width=\"422\" height=\"450\" data-id=\"16697\" srcset=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/03\/jpro_38_chlorination_well_water_system.png 1596w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/03\/jpro_38_chlorination_well_water_system-282x300.png 282w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/03\/jpro_38_chlorination_well_water_system-961x1024.png 961w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/03\/jpro_38_chlorination_well_water_system-768x818.png 768w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/03\/jpro_38_chlorination_well_water_system-400x426.png 400w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/03\/jpro_38_chlorination_well_water_system-500x533.png 500w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/03\/jpro_38_chlorination_well_water_system-1442x1536.png 1442w\" sizes=\"auto, (max-width: 422px) 100vw, 422px\" \/><\/a><\/p>\n<p>Iron bacteria are not effectively treated by polyphosphate or a standard iron filter alone. They require <strong>chlorination upstream<\/strong> \u2014 typically a chlorine injection system \u2014 to kill the bacteria before the water reaches the filter.<\/p>\n<h3>Q: How do I know if I have iron bacteria vs just dissolved iron?<\/h3>\n<p>The clearest sign of iron bacteria is slimy, gelatinous buildup \u2014 often described as looking like orange or reddish-brown snot \u2014 inside toilet tanks, around sprinkler heads, or in the irrigation line itself. Dissolved iron alone causes staining but not slime. <a href=\"https:\/\/www.cleanwaterstore.com\/bacteria-test-kits\/iron-bacteria-test.html\">A water test that includes iron bacteria<\/a> testing will confirm which you&#8217;re dealing with. Call our team and we can help you interpret your results.<\/p>\n<hr \/>\n<h2>How to Size an Iron Filter for Irrigation<\/h2>\n<p>Sizing an irrigation iron filter is different from sizing a household system. Here&#8217;s what you need to know:<\/p>\n<p><strong>Step 1: Measure your irrigation flow rate in GPM.<\/strong> Run your irrigation system and measure the flow at the main irrigation valve using a flow meter or a bucket test. Irrigation systems commonly run at 15\u201350 GPM depending on the number of zones running simultaneously.<\/p>\n<p><strong>Step 2: Know your iron level.<\/strong> Get a water test that includes iron (ferrous and ferric), manganese, pH, and iron bacteria. Iron level determines the media type and tank size required.<\/p>\n<p><a href=\"https:\/\/www.cleanwaterstore.com\/lab-tests-for-well-water.html\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-11984\" src=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/01\/Simple_Lab_Water_test.webp\" alt=\"SimpleLab Certified Lab tests available at Clean Water Store, test results are used to customize a whole home water treatment and filter system.\" width=\"450\" height=\"450\" data-id=\"11984\" srcset=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/01\/Simple_Lab_Water_test.webp 1080w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/01\/Simple_Lab_Water_test-300x300.webp 300w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/01\/Simple_Lab_Water_test-1024x1024.webp 1024w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/01\/Simple_Lab_Water_test-150x150.webp 150w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/01\/Simple_Lab_Water_test-768x768.webp 768w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/01\/Simple_Lab_Water_test-400x400.webp 400w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/01\/Simple_Lab_Water_test-500x500.webp 500w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/01\/Simple_Lab_Water_test-120x120.webp 120w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p><strong>Step 3: Consider your backwash window.<\/strong> An irrigation iron filter needs a backwash cycle \u2014 typically 10\u201315 minutes \u2014 when irrigation is not running. This usually means scheduling backwash at night or early morning before the irrigation controller starts.<\/p>\n<p><strong>Step 4: Match tank size to flow rate.<\/strong> Unlike household filters sized for 8\u201312 GPM, irrigation filters often need to handle 20\u201350 GPM. This means larger tank diameters to provide adequate media contact time and sufficient backwash flow. Our water specialists size irrigation systems every day \u2014 call or chat with us and we&#8217;ll build the right spec for your setup.<\/p>\n<hr \/>\n<h2>What Should I Do First?<\/h2>\n<p><strong>Test your water.<\/strong> You cannot choose the right solution without knowing your iron level, iron type, pH, and whether iron bacteria are present. A water test also tells you whether polyphosphate is likely to be sufficient or whether filtration is the better investment for your situation.<\/p>\n<p>At Clean Water Store, our WQA certified water specialists review water test results and help homeowners design the right irrigation treatment system for their specific water chemistry and flow requirements. We&#8217;ve been solving iron staining problems for well water customers since 1986.<\/p>\n<p><a href=\"https:\/\/www.cleanwaterstore.com\/blog\/ultimate-guide-water-testing\/\">Order a Water Test Kit \u2014 Start Here<\/a><\/p>\n<p><a href=\"https:\/\/www.cleanwaterstore.com\/iron-and-manganese-filters-for-well-water.html\">View Pro-OX Iron Filter Systems<\/a><\/p>\n<p><a href=\"https:\/\/www.cleanwaterstore.com\/blog\/how-to-remove-iron-manganese-and-odor-from-well-water-step1\/\">Complete Guide: How to Remove Iron, Manganese &amp; Odor from Well Water<\/a><\/p>\n<p><a href=\"https:\/\/go.appointmentcore.com\/book\/eZeZdVQj\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-15526\" src=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/09\/request-a-call-CTA-final.jpg\" alt=\"Clean Water Store call-to-action banner inviting users to request a free call for more information about water treatment systems, with phone number and green \u201cBook Now\u201d button.\" width=\"1700\" height=\"266\" data-id=\"15526\" srcset=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/09\/request-a-call-CTA-final.jpg 1700w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/09\/request-a-call-CTA-final-300x47.jpg 300w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/09\/request-a-call-CTA-final-1024x160.jpg 1024w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/09\/request-a-call-CTA-final-768x120.jpg 768w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/09\/request-a-call-CTA-final-400x63.jpg 400w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/09\/request-a-call-CTA-final-500x78.jpg 500w, https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2025\/09\/request-a-call-CTA-final-1536x240.jpg 1536w\" sizes=\"auto, (max-width: 1700px) 100vw, 1700px\" \/><\/a><\/p>\n<p><em>Article last updated by Author on May 26, 2026.<\/em><\/p>\n<hr \/>\n<h2>Helpful Resources<\/h2>\n<p><a href=\"https:\/\/njaes.rutgers.edu\/fs516\/\" target=\"_blank\" rel=\"noopener\">Management of Iron in Irrigation Water \u2014 Rutgers University Extension<\/a><\/p>\n<p><a href=\"https:\/\/extension.psu.edu\/iron-and-manganese-in-private-water-systems\" target=\"_blank\" rel=\"noopener\">Iron and Manganese in Private Water Systems \u2014 Penn State Extension<\/a><\/p>\n<p><a href=\"https:\/\/extensionpubs.unl.edu\/publication\/g1714\/na\/html\/view\" target=\"_blank\" rel=\"noopener\">Iron and Manganese in Drinking Water \u2014 University of Nebraska Extension<\/a><\/p>\n<p><a href=\"https:\/\/extension.psu.edu\/interpreting-irrigation-water-tests\" target=\"_blank\" rel=\"noopener\">Interpreting Irrigation Water Tests \u2014 Penn State Extension<\/a><\/p>\n<p><a href=\"https:\/\/www.health.mn.gov\/communities\/environment\/water\/docs\/wells\/waterquality\/ironbacteria.pdf\" target=\"_blank\" rel=\"noopener\">Iron Bacteria in Well Water \u2014 Minnesota Department of Health<\/a><\/p>\n<p><a href=\"https:\/\/extension.psu.edu\/iron-and-sulfur-bacteria-a-slimy-problem\" target=\"_blank\" rel=\"noopener\">Iron and Sulfur Bacteria: A Slimy Problem \u2014 Penn State Extension<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>If your sprinklers are leaving orange or brown stains on your fence, driveway, siding, or concrete, you&#8217;ve probably already tried scrubbing them off. Maybe more than once. The frustrating truth: cleaning the stains does nothing to prevent new ones. Until you treat the water causing them, the stains will keep coming back \u2014 every single &hellip; <a href=\"https:\/\/www.cleanwaterstore.com\/blog\/stop-rust-stains-sprinklers-well-water\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">How to Stop Rust Stains from Sprinklers for Good (Well Water Guide)<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":16947,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[17,1,5],"tags":[],"class_list":["post-16937","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-iron-filters","category-uncategorized","category-water-testing"],"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>Why Are My Sprinklers Leaving Rust Stains?<\/title>\n<meta name=\"description\" content=\"Orange rust stains from your sprinklers? 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Clean, Safe Water Solutions from Clean Water Store.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cleanwaterstore.com\/blog\/stop-rust-stains-sprinklers-well-water\/\" \/>\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=\"2026-05-26T19:31:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-11T22:42:39+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.cleanwaterstore.com\/blog\/wp-content\/uploads\/2026\/05\/rusty_sprinklers_solutions_video.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1184\" \/>\n\t<meta property=\"og:image:height\" content=\"666\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\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=\"10 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/stop-rust-stains-sprinklers-well-water\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/stop-rust-stains-sprinklers-well-water\\\/\"},\"author\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/#gerry\"},\"headline\":\"How to Stop Rust Stains from Sprinklers for Good (Well Water Guide)\",\"datePublished\":\"2026-05-26T19:31:02+00:00\",\"dateModified\":\"2026-10-11T22:42:39+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/stop-rust-stains-sprinklers-well-water\\\/\"},\"wordCount\":1928,\"publisher\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/stop-rust-stains-sprinklers-well-water\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/rusty_sprinklers_solutions_video.png\",\"articleSection\":[\"Iron Filters\",\"Treating Well Water\",\"Water Testing\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/stop-rust-stains-sprinklers-well-water\\\/\",\"url\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/stop-rust-stains-sprinklers-well-water\\\/\",\"name\":\"Why Are My Sprinklers Leaving Rust Stains?\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/stop-rust-stains-sprinklers-well-water\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/stop-rust-stains-sprinklers-well-water\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.cleanwaterstore.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/rusty_sprinklers_solutions_video.png\",\"datePublished\":\"2026-05-26T19:31:02+00:00\",\"dateModified\":\"2026-10-11T22:42:39+00:00\",\"description\":\"Orange rust stains from your sprinklers? 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