Atrazine is the most-detected pesticide in tap water Summer runoff pushes herbicide levels up Boiling does not remove pesticides Activated carbon is a recognized atrazine treatment NSF/ANSI 42 chlorine taste and odor reduction Carbon block beats granular carbon for trace organics CoreXchange filtration media Atrazine is the most-detected pesticide in tap water Summer runoff pushes herbicide levels up Boiling does not remove pesticides Activated carbon is a recognized atrazine treatment NSF/ANSI 42 chlorine taste and odor reduction Carbon block beats granular carbon for trace organics CoreXchange filtration media

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2026 water quality guide

Pesticides in your tap water? Summer is peak season.

Every spring and summer, farms apply millions of pounds of herbicides like atrazine, and rain carries a share into the rivers and reservoirs that feed our taps. A decade-long study published in July 2026 found the problem is getting worse. Here is what that means for your glass, and how a carbon filter helps.

Most-detected Atrazine is the most common pesticide found in U.S. tap water

Summer peak Herbicide levels climb after spring and summer runoff

Carbon adsorbs Activated carbon is a recognized treatment for atrazine

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NSF/ANSI 42 certified Calm, source-cited guide Carbon block filtration

The quick picture

Herbicides do not spike randomly. They follow the farm calendar, and summer is the peak.

Pesticides in drinking water are mostly a seasonal story. Herbicides like atrazine and metolachlor go on corn, soybean, and sorghum fields in spring and early summer, and the first big rains wash a share of them into the streams and reservoirs that supply tap water. That is why levels typically climb from late spring through summer, then fall in winter. A decade-long analysis of Midwest and Great Plains rivers reported in July 2026 found that pesticide pollution is not improving and is often getting worse, with atrazine the single pesticide pushing the most sites above benchmarks meant to protect against short-term harm. Atrazine already turns up in more than 2,000 public water systems serving about 40 million people. None of this means your water is unsafe today, but it does mean a summer glass is more likely to carry trace herbicides, and those are chemicals, not germs, so boiling does nothing. A carbon filter is built for exactly this kind of chemistry.

ATZ MET

Spray herbicides go on fields in spring and summer

Rain runoff carries atrazine into source water

Carbon adsorbs the trace organics at your tap

It is a runoff problem, not a random one.

Herbicides are applied on a calendar and washed out by rain, so atrazine and metolachlor peak in late spring and summer and ease off in colder months.

Utilities struggle most in peak season.

Atrazine resists breakdown and is hard for conventional treatment to fully remove, especially in the spring and summer weeks when the most is applied.

Boiling does not help.

Atrazine is a heat-stable chemical, so boiling will not remove it and can slightly concentrate it. Reducing it takes adsorption or a membrane, like carbon or reverse osmosis.

What carbon can honestly do

Activated carbon is a recognized way to reduce atrazine. It is not a fix for everything in farm-country water.

Here is the honest division. Activated carbon works by adsorption: as water passes through the carbon, organic chemicals like atrazine and other herbicides stick to its enormous internal surface. The EPA and university extension guides list activated carbon among the recognized treatments for atrazine, and a dense carbon block holds water in contact longer than loose granular carbon, which helps with trace organics. Epic's Pure XP is a carbon fiber block, NSF certified to Standard 42 for chlorine taste and odor and to NSF/ANSI/CAN 372 for lead-free materials, and independently lab-tested to reduce 99.9% of lead and tested against the NSF/ANSI P473 protocol for PFOA and PFOS. Two honest limits: nitrate, which often travels with pesticides in farm runoff, is not removed by carbon and needs reverse osmosis or ion exchange; and no carbon pitcher is a substitute for boiling during a bacterial advisory. For the trace herbicides that define summer tap water, though, a carbon block is the right tool.

Epic water filter materials and certification visual

40M people served by systems where atrazine is detected Environmental Working Group Tap Water Database.

Summer when herbicide runoff and tap levels usually peak Application plus rain drives the seasonal rise.

Carbon a recognized treatment for atrazine adsorption EPA and extension treatment guidance.

NSF 42 the standard for chlorine taste and odor Pure XP is NSF certified to Standard 42.

The simple checklist

Three calm steps for summer herbicide season.

Know your season and source.

Atrazine and metolachlor peak from late spring through summer runoff.
Check your annual Consumer Confidence Report for detected pesticides.
On a private well near farmland, test for pesticides and nitrate.

Filter with activated carbon.

Carbon adsorbs atrazine and other organic herbicides at the tap.
A dense carbon block outperforms loose granular carbon for trace organics.
Replace the cartridge on schedule so the carbon keeps working.

Do not rely on boiling.

Boiling kills germs but leaves heat-stable pesticides behind.
Evaporation can slightly concentrate atrazine, not remove it.
For nitrate alongside pesticides, use reverse osmosis or ion exchange.

Inside the cartridge

For trace herbicides, a carbon fiber block is the right tool.

The mechanism is simple. Water flows through a solid block of compressed activated carbon, and organic chemicals like atrazine adsorb onto the carbon's vast internal surface instead of passing into your glass. Because the block is dense, water cannot channel around it the way it can with loose granular carbon, so contact time stays high and reduction improves. The same block reduces chlorine taste and odor, the aesthetic effect covered by NSF/ANSI Standard 42, and Pure XP is NSF certified to Standard 42 along with NSF/ANSI/CAN 372 for lead-free materials. Its lead and PFAS reduction results are independently lab-tested, evaluated against NSF/ANSI 53 and the P473 protocol, not NSF certified, and Epic keeps that distinction clear. The one rule that keeps it working: replace the cartridge on schedule, because saturated carbon stops adsorbing.

Adsorption The carbon fiber block adsorbs atrazine, herbicides, and other organic chemicals as water flows through its compressed core.

Certified materials Pure XP is NSF certified to Standard 42 for chlorine taste and odor, plus NSF/ANSI/CAN 372 for lead-free materials.

Honest boundary Carbon does not remove nitrate, which often accompanies farm runoff; that needs reverse osmosis or ion exchange.

Tap water in

Layer 1: Nano fiber media

Layer 2: Carbon fiber block core

Filtered water out

A look inside

Runoff is seasonal. Clean water is a habit.

Know the season Skip the boil Filter for herbicides Reduce chlorine taste Replace on schedule

Choose your setup

Better water for the herbicides summer runoff brings.

Pure XP is a carbon fiber block, NSF certified to Standard 42 for chlorine taste and odor and built to adsorb trace organic chemicals. Use the direct buttons below to add the exact product to cart.

Recommended

Pure XP Pitcher

Everyday carbon block filtration for the trace herbicides that peak in summer.

Carbon fiber block adsorbs organic chemicals like atrazine
Independently lab-tested to reduce 99.9% of lead
NSF certified to Standard 42 and NSF/ANSI/CAN 372

Buy Pure XP Pitcher

Best for families

Pure XP Dispenser

The same Pure XP carbon filtration with more ready-to-pour capacity.

Same NSF Standard 42 certified Pure XP media
Great for fridge or counter routines
Fits households that refill often

Buy Dispenser

Microbiological pick

Nano XP Pitcher

Adds microbiological and microplastics reduction while maintaining fluoride.

NSF certified to Standard 42 + NSF/ANSI/CAN 372
Tested to reduce over 99.9% of microplastics
Adds microbiological reduction; still follow boil advisories

Buy Nano XP

Best under sink

Smart Shield Max

Tap-first filtration for kitchens where you want the counter clear.

CoreXchange double-layer media
Up to 750 gallons per filter
Under-sink convenience

Buy Smart Shield Max

Fast decision guide

Pick by the problem, not by panic.

Carbon block is for the everyday chemistry of your tap, including trace herbicides. Reverse osmosis adds a barrier for nitrate.

Pure XP

Choose this for chlorine taste and odor, trace herbicides, and lead. Everyday carbon block filtration for summer runoff season.

Nano XP

Choose this for microbiological plus microplastics concerns. Good when fluoride retention is part of the decision.

Dispenser

Choose this when everyone in the house keeps refilling. Same simple behavior, more ready water.

Max

Choose this when you want filtration at the sink. Best for a cleaner counter and tap-first flow.

Need Pure XP Nano XP Max

Chlorine taste and odor Strong Strong Strong

No install Yes Yes No

NSF certifications 42/372 42/372 N/A

Quick answers

Boiling and filtering FAQ, minus the wall of text.

Are there pesticides in my tap water?

Often, at low levels, yes. Atrazine is the most commonly detected pesticide in U.S. tap water, found in samples from more than 2,000 utilities serving about 40 million people, according to the Environmental Working Group. Levels usually rise in late spring and summer, when herbicides are applied to crops and rain washes them into rivers and reservoirs. A carbon block filter reduces many of these organic chemicals at the tap.

Why are pesticide levels higher in summer?

Because summer is application and runoff season. Farmers apply herbicides like atrazine and metolachlor to corn, soybean, and sorghum fields in spring and early summer, and rainstorms wash a share of that into nearby streams and drinking-water sources. Utilities can struggle to remove atrazine in these peak months, so the water leaving the plant may carry more of it than in winter.

Does boiling water remove pesticides?

No. Boiling kills bacteria and parasites, but atrazine and most herbicides are heat-stable chemicals that boiling does not break down. Because some water leaves as steam, boiling can even concentrate them slightly. To reduce pesticides you need adsorption or membrane treatment, such as activated carbon or reverse osmosis, not heat.

Does a water filter remove atrazine?

A quality activated carbon filter can substantially reduce atrazine. The EPA and university extension guides list activated carbon as a recognized treatment for atrazine and similar organic chemicals, because the carbon adsorbs the molecules as water passes through. Carbon block filters, like Epic's Pure XP, hold water in contact with a dense carbon core, which helps with these trace organics. Replace the cartridge on schedule, since saturated carbon stops adsorbing.

Is atrazine in tap water dangerous?

The science is still developing. Atrazine is an endocrine-disrupting herbicide that some studies link to hormone and reproductive effects, though findings are not conclusive. The EPA sets a legal limit, a maximum contaminant level, for atrazine in public water, but many health advocates argue that limit, set decades ago, is not protective enough. Reducing exposure where you can is a reasonable, low-cost step.

Is carbon block or granular carbon better for pesticides?

For trace organics like atrazine, a dense carbon block generally outperforms loose granular carbon. A block forces water through a maze of compressed carbon with more contact time and no channeling, so more of the chemical is adsorbed. Epic's Pure XP uses a carbon fiber block for this reason. Reverse osmosis is another effective option for households that want a whole additional barrier.

Do I need to test my water for pesticides?

If you are on a public system, your annual Consumer Confidence Report lists detected contaminants, including atrazine where it is monitored. If you rely on a private well near farmland, testing for pesticides and nitrate is worth doing, because wells are not covered by utility monitoring. Either way, a carbon filter is a sensible everyday barrier for the trace organics that show up in summer.

Ready to make it simple?

Summer runoff is seasonal. Your filter does not have to be.

Pure XP for chlorine taste and odor, trace herbicides, and lead, NSF certified to Standard 42. Nano XP for microbiological and microplastics priorities. Dispenser for more household capacity.

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Atrazine is the most commonly detected pesticide in U.S. tap water and has been found in systems serving about 40 million people, per the Environmental Working Group Tap Water Database. A decade-long analysis of Midwest and Great Plains rivers reported in July 2026 found pesticide pollution is not improving and often worsening, with atrazine, metolachlor, and imidacloprid the leading concerns. Herbicide levels in source water typically rise in spring and summer with application and runoff. Activated carbon is recognized by the EPA and university extension guidance as a treatment for atrazine and similar organic chemicals; nitrate is not removed by carbon and requires reverse osmosis or ion exchange. Boiling does not remove pesticides and can slightly concentrate them. Product claims are based on Epic Water Filters published testing and certification information: Pure XP is NSF certified to Standard 42 and NSF/ANSI/CAN 372, and is independently lab-tested to reduce 99.9% of lead and evaluated against NSF/ANSI 53 and the NSF/ANSI P473 protocol for PFOA and PFOS; these performance results are independently tested, not NSF certified. A point-of-use filter supplements, but does not replace, your utility's treatment or monitoring. Product performance can vary by water quality, usage, and filter replacement schedule. Last updated July 2026.