Your home likely has three distinct lead sources: the service line from the street (banned 1986), solder at copper pipe joints (banned 1986), and brass fixtures (limited to 0.25% lead in 2014). Each leaches differently, costs different amounts to fix, and requires different testing strategies. A 1985 brass faucet on copper pipes with no lead service line can still leach 50 ppb into your first morning draw.
A chrome-plated brass faucet manufactured in 1985, connected to copper pipes with no lead service line, can still leach 50 parts per billion of lead into the first glass you pour in the morning. Most homeowners hear "lead in your water" and picture a single villain: the old lead pipe buried under the street. They spend $8,000 replacing the service line, test their water six months later, and find lead levels barely moved.
The problem is misdiagnosis. Three distinct lead sources exist in most homes built before 2014, and they behave completely differently. One contaminates every drop of water that sits overnight. Another only affects the first 8 ounces from a specific tap. The third leaches heavily for five years, then tapers off as mineral scale forms. Replacing the wrong one wastes thousands of dollars and leaves your family exposed.
This is the disambiguation guide: how to identify each source, which one poses the highest risk, and what your actual options are at every price point.
A lead service line is the pipe that connects the water main under the street to your home's plumbing system. It's typically 3/4 inch in diameter, runs underground from the curb to your basement or crawlspace, and enters near the water meter. According to the EPA's 2021 inventory, 9.2 million lead service lines remain in use across the United States, most of them installed before 1950.
When they were banned: Federal law prohibited new lead service line installation in 1986 under the Safe Drinking Water Act amendments. Some cities banned them earlier (Chicago in 1986, Boston in 1989), while others continued partial replacements into the early 1990s.
What they look like: Solid lead pipe is dull gray and soft. If you scratch it with a key or coin, it reveals a shiny silver color underneath. A magnet will NOT stick to lead pipe (this is the key test to distinguish it from galvanized steel, which is magnetic and much harder). Copper pipes are orange-red. Plastic pipes (PEX, PVC) are obvious.
How to identify yours: Go to your basement or crawlspace and locate where the water line enters the building, usually within a few feet of the water meter. Scrape the pipe gently with a key. Lead is soft enough that you'll leave a shallow groove. Galvanized steel will resist scratching and show a dull gray interior. If the pipe is in an inaccessible location or you're uncertain, many utilities offer free lead service line inspections – call your water department and ask.
Risk profile: This is the highest-risk source for sustained exposure. When water sits in a lead service line overnight or while you're at work, lead leaches into the entire volume of stagnant water. The first gallon drawn in the morning can contain 50-300 ppb of lead depending on water chemistry (pH, alkalinity, chlorine levels). Flushing helps, but you're still drinking lead-contaminated water from the service line until you run the tap long enough to clear the entire pipe volume – typically 5-10 minutes.
Lead service lines contaminate water at multiple taps simultaneously. If your kitchen, bathroom, and basement utility sink all test high for lead after flushing, the service line is the likely source.
Replacement cost: $4,000-$10,000 is typical for full replacement, though costs vary widely by region and site conditions. Urban replacements with pavement restoration can exceed $15,000. Rural replacements with long service lines can hit $20,000.
The EPA's October 2024 Lead and Copper Rule Improvements (LCRI) require utilities to replace lead service lines within 10 years and prohibit partial replacements (which can temporarily increase lead levels by disturbing scale). The Infrastructure Investment and Jobs Act allocated $15 billion for lead service line replacement – check if your utility is participating in a funded replacement program. Many cities now cover the public-side portion (curb to water main) and split the private-side cost (curb to home) with the homeowner.
If replacement isn't financially feasible right now, run the tap for 5 minutes before using water for drinking or cooking. It's inconvenient and wasteful, but it clears the service line. We have a lead service line replacement cost calculator that estimates your local cost range based on your ZIP code and typical site conditions.
Lead-tin solder was the standard method for joining copper pipes until 1986. If you have copper plumbing installed before 1988 (allowing for lag between the law and practice), you almost certainly have lead solder at every joint.
When it was banned: The same 1986 Safe Drinking Water Act amendments that banned lead service lines also prohibited lead solder with more than 0.2% lead content in plumbing systems. Plumbers transitioned to lead-free silver-based solders (typically silver-antimony or silver-bismuth alloys).
What it looks like: Lead solder appears as a dull silver-gray bead at the joint between two copper pipes. Modern lead-free solder looks nearly identical to the untrained eye – both are silver-toned and form a fillet around the joint. There is no reliable visual test to distinguish them without laboratory analysis.
How to identify it: If your home was built or had plumbing work done before 1988, assume lead solder is present at copper pipe joints. Inspect your basement, crawlspace, or utility areas where exposed copper plumbing is visible. Look for soldered joints (smooth silver beads) rather than compression fittings (brass nuts) or PEX connections (plastic crimps).
You can't reliably test for lead solder by looking at it. The only way to know if it's leaching is water testing with sequential sampling (see Testing Strategy below).
Risk profile: Lead solder is paradoxically highest-risk in newer installations. According to Edwards and Dudi's 2004 study in the Journal of the American Water Works Association, lead solder leaches heavily in the first 5-7 years after installation as corrosion processes mobilize lead from the solder surface. After about a decade, mineral scale forms at the joints and leaching drops significantly.
A home with 40-year-old lead solder often has lower lead levels than a home with 10-year-old lead solder, assuming similar water chemistry. This counterintuitive finding means that homes built in the 1970s with original copper-and-solder plumbing may currently have lower lead exposure than homes repiped in 2005.
Lead solder primarily affects water that sits in contact with soldered joints for extended periods. First-draw water from taps with many joints upstream (like an upstairs bathroom at the end of a long pipe run) will show higher lead than taps close to the service line entry point.
Replacement cost: Full replumbing to remove all lead solder costs $15,000-$30,000+ for a typical single-family home. This is rarely cost-effective compared to point-of-use filtration. We recommend testing first – if lead levels are below 5 ppb after a 30-second flush, the solder may not be leaching significantly and replacement isn't justified.
For homes with confirmed solder leaching, the practical fix is NSF 53-certified filters at drinking water taps rather than tearing out walls to replace every soldered joint. A quality under-sink reverse osmosis system costs $200-$500 and removes 95-99% of lead.
This is the source most homeowners miss entirely. Brass is an alloy of copper and zinc, and until January 2014, "lead-free" brass could legally contain up to 8% lead by weight. Faucets, valves, and brass fittings manufactured before 2014 can leach significant lead even when connected to completely lead-free pipes.
When the standard changed: The Reduction of Lead in Drinking Water Act, which took effect January 4, 2014, lowered the maximum weighted average lead content in fixtures from 8% to 0.25%. Fixtures manufactured after this date and certified to NSF 372 and NSF 61 standards are genuinely low-lead.
What they look like: You can't identify leaching brass fixtures by appearance. Chrome-plated brass looks identical whether it was made in 1985 or 2025. The only reliable identifier is the manufacture date stamp, usually located inside the spout, under the handle, or on the underside of the faucet body. If the faucet has no date stamp or was installed before 2014, treat it as a potential lead source.
NSF 372 certification marks indicate compliance with the 0.25% standard. Check the faucet documentation or look for an NSF mark on the fixture itself.
How to identify yours: Check installation dates. If you moved into your home after 2014 and the kitchen and bathroom faucets are original, they're likely compliant. If the faucets are older or were installed before 2014, they're candidates for replacement. Some manufacturers (Moen, Delta, Kohler) maintain date-code lookup tools on their websites where you can enter the model number and manufacture date code to determine compliance.
Risk profile: Brass fixtures cause localized, first-draw contamination at specific taps. When water sits in the faucet body overnight, lead leaches from the brass into the first 8-32 ounces drawn from that tap. Flush the tap for 30 seconds and lead levels drop sharply because you've cleared the water that was in contact with the brass.
This creates a diagnostic signature: if your kitchen faucet shows 40 ppb in the first-draw sample and 3 ppb after a 30-second flush, the fixture is the problem, not the service line or premise plumbing. If first-draw and flushed samples are both improved, look upstream at service lines or solder.
Brass fixture leaching is highest in soft, low-pH water (common in the Pacific Northwest, parts of New England, and anywhere rainwater or snowmelt dominates the supply). Hard water with high alkalinity forms protective scale inside fixtures faster, reducing leaching.
Replacement cost: $50-$300 per faucet depending on quality and installation complexity. This is the best return on investment of any lead source mitigation. Replacing a single kitchen faucet with an NSF 372-certified model eliminates lead exposure at the tap your family uses most, for the cost of dinner out.
We recommend starting with kitchen and bathroom sink faucets (where drinking water is drawn) before replacing less-critical fixtures like laundry or outdoor spigots. Buy certified low-lead fixtures – not just "lead-free" marketing claims. Look for the NSF 372 mark or check the NSF International database.
Your lead test results tell a story about which source is leaching. Here's how to read them:
First-draw lead high, fully-flushed lead low: You have a fixture problem or a short section of lead plumbing close to the tap (like a brass valve or short lead pipe stub). The leaching source is localized to the last few feet before the faucet. Replace the fixture first – it's the cheapest fix.
First-draw and flushed both improved, similar levels at all taps: You have a service line problem. Lead is leaching into the entire volume of water sitting in the pipe overnight, so flushing one tap doesn't clear it – the contamination is upstream at the service line. Check the pipe where it enters your basement.
One tap shows high lead, others are fine: That specific fixture or the plumbing branch serving it is the source. Test first-draw vs flushed at that tap to distinguish fixture (drops with flushing) from a lead pipe section in that branch (stays improved).
First-draw improved, flushed somewhat lower but still above 5 ppb: You likely have multiple sources – possibly a service line plus fixtures, or extensive lead solder plus a service line. This is the expensive scenario. Prioritize replacement based on which source contributes the most lead after a 30-second flush (the service line).
The EPA's Lead and Copper Rule requires utilities to test using a first-draw sample – water that has sat stagnant in the plumbing for at least 6 hours. This captures peak lead exposure. For diagnosis, you want both first-draw and flushed samples at the same tap.
Protocol: 1. Don't use water at the test tap for at least 6 hours (overnight is ideal) 2. Collect the first liter drawn without flushing – this is your first-draw sample 3. Run the tap at normal flow for 30 seconds 4. Collect a second liter – this is your flushed sample 5. Send both to a lab
SimpleLab's Tap Score offers lead-only panels for $60-$150 depending on turnaround time and includes detailed analysis. If you want to test multiple taps, start with the kitchen tap and one bathroom tap on opposite sides of the house – this tells you if the problem is localized or system-wide.
If first-draw is above 15 ppb (the EPA action level) or flushed is above 5 ppb, investigate further. We have a detailed guide to lead testing protocols and lab options including sequential sampling instructions.
Filters. Specifically, point-of-use filters certified to NSF Standard 53 for lead reduction.
Not all filters remove lead. The standard Brita pitcher uses activated carbon, which doesn't capture lead effectively. Brita's Elite and Longlast filters are NSF 53-certified, but most Brita pitchers in use are the standard model. Check your filter's packaging – if it doesn't say NSF 53 for lead, it's not removing lead.
Reverse osmosis (RO) systems are the most effective option. Under-sink RO units remove 95-99% of lead regardless of source – they'll handle service line contamination, solder leaching, and fixture contamination equally well. Expect to pay $200-$500 for a quality system plus installation.
Countertop or faucet-mount filters certified to NSF 53 are cheaper ($40-$150) and easier to install, but they have lower capacity and need more frequent filter changes. They work well if your lead levels are below 50 ppb and you're filtering drinking water only, not shower or dishwashing water.
Find NSF 53-certified lead filters on Amazon.
Filters don't fix the problem – they manage exposure. If you have a lead service line, you're still showering and washing dishes in lead-contaminated water (which is lower risk than drinking it, but not zero risk for young children). Filters are a stopgap while you save for replacement or wait for a utility-funded program.
We maintain a detailed comparison of lead filtration options including flow rates, filter lifespans, and certification statuses.
Here's the uncomfortable truth: replacing a lead service line to drop lead levels from 25 ppb to 8 ppb costs $4,000-$10,000. Replacing a kitchen faucet to drop levels from 40 ppb to 2 ppb costs $150. Both achieve the goal of getting below 5 ppb, which is the American Academy of Pediatrics' recommended limit for children.
Start with the cheap wins. Test your water. If first-draw lead is high and flushed lead is low, replace your fixtures – you'll spend $300-$500 and solve 80% of your exposure. If both first-draw and flushed are improved, you likely have a service line problem, and that's when you need to budget for the big fix (or filter everything while you save).
Don't replace your service line without testing first. We've seen homeowners spend $8,000 on service line replacement when their actual problem was a $180 brass faucet. Test, diagnose, replace in order of cost-effectiveness.
The EPA's new LCRI rule requires utilities to replace lead service lines within 10 years, and the Infrastructure Investment and Jobs Act provides $15 billion in funding. If your utility is participating, you may qualify for partial or full cost coverage. Check your utility's lead service line replacement program status and sign up for their replacement list if one exists.
Don't do them. Partial replacement – replacing only the public portion (water main to curb) or only the private portion (curb to house) while leaving the other half in place – can temporarily spike lead levels by disturbing protective scale inside the old pipe.
The EPA's October 2024 LCRI explicitly prohibits utilities from conducting partial replacements unless the homeowner refuses to replace their portion. If your utility offers to replace their side but wants you to leave your side alone, decline and ask to be placed on the list for full replacement. Partial replacement often makes the problem worse for 6-18 months while new scale forms.
If your lead levels are above 100 ppb or you have young children or pregnant women in the home with levels above 15 ppb, act now:
Lead exposure is cumulative. The sooner you reduce exposure, the better the long-term outcomes.
Want to know which lead source is most likely affecting your home? We built a source-specific exposure calculator that uses your home's age, location, and plumbing type to estimate risk from service lines, solder, and fixtures separately. Try the lead source calculator – it takes 90 seconds and gives you a prioritized replacement plan.
If you already have your water tested, upload your lead test results for a detailed exposure analysis and source diagnosis. We'll tell you which source is most likely responsible and what your options are at every budget level.
How can I tell if my pipes are lead? Go to your basement or crawlspace and locate the pipe where water enters your home, near the meter. Scratch it gently with a key. If it's soft, dull gray, and scratches to reveal shiny silver underneath, it's lead. If a magnet sticks to it, it's galvanized steel, not lead. Copper is orange-red, and plastic pipes are obvious.
When did they stop using lead solder in plumbing? Lead solder with more than 0.2% lead content was banned in 1986 under the Safe Drinking Water Act amendments. Plumbers transitioned to lead-free silver-based solders, but homes built or repiped before 1988 almost certainly have lead solder at copper pipe joints. Paradoxically, older lead solder leaches less than newer installations due to mineral scale buildup.
Is brass safe for drinking water? Modern brass fixtures certified to NSF 372 (effective January 2014) are limited to 0.25% weighted average lead content and are considered safe. Brass faucets and valves manufactured before 2014 could contain up to 8% lead and can leach significant amounts, especially in soft or acidic water. Replace pre-2014 brass fixtures at taps used for drinking water.
How much does it cost to replace a lead service line? Full lead service line replacement typically costs $4,000-$10,000, though urban sites with pavement restoration can exceed $15,000. The EPA's 2024 rule requires utilities to replace lead service lines within 10 years, and $15 billion in federal funding is available. Many utilities now cover the public portion and split private-side costs with homeowners. Check if your utility participates in a funded replacement program.
Will a Brita pitcher remove lead from old solder? Standard Brita pitchers are NOT certified to remove lead. Only Brita's Elite and Longlast filters are NSF 53-certified for lead reduction. For reliable lead removal from any source (service line, solder, or fixtures), use a reverse osmosis system or a filter explicitly certified to NSF Standard 53. Check the packaging – if it doesn't say NSF 53 for lead, it won't remove it effectively.