Water utility
Where Willmar’s water comes from
Utility Willmar
Water system Willmar · MN1340016
Source water Groundwater
Disinfectant not on record
Population served 21,991
Reporting period Sampled 2024–2026
Monitoring coverage 32 records · 3 of 4 groups measured
Service lines 4 lead, 100 galvanized, 846 unknown material (EPA inventory, 2026Q2) Likely match, check your bill Your water bill or annual water quality report names your actual supplier.
MN1340016 · 21,991 served 73 /100 · Fair Confidence: moderate
Why this matters 1 2 Treatment The treatment details are not on record.
3 Distribution Mains, then your building’s service line.
4 Your tap Plumbing inside the building is outside this record.
At a glance
Willmar water in four numbers 73 /100 · Fair Confidence: moderate Purity Score Willmar · PWSID MN1340016
3 Detected 2 above a reference
2 Above a reference of 32 records
0 Health-based violations last 10 years · EPA SDWIS
Copper (90th percentile) is above its federal limit; lithium sits above a screening level.
What we found
3 detected results, by distance from their limit ? Each bar runs to the named reference; the tick marks it. Open a row for five layers: measured, compared, meaning, where it matters, what to do. Li Lithium Above screening · Screening level 10 µg/L EPA health reference level (screening, not a legal limit) 35.7 µg/L ▾ ① · Measured 35.7 µg/L, sampled 2024-05-21 to 2024-11-20. EPA UCMR 5.
② · Compared 10 µg/L EPA health reference level (screening, not a legal limit).
③ · Meaning Detected at up to 35.7 µg/L (above the 10 µg/L EPA health reference level; a screening level, not a legal limit).
④ · Where it matters Where it enters is not in this record.
⑤ · What to do Test your own tap first. To reduce it: Depends on the contaminant (The certifier's listing for each named contaminant).
See the evidence record → Cu Copper (90th percentile) Above limit · Action level 1.3 mg/L federal action level 1.66 mg/L ▾ ① · Measured 1.66 mg/L, sampled 2026–2026 monitoring period (still open). EPA SDWIS (Lead & Copper Rule).
② · Compared 1.3 mg/L federal action level. EPA health goal (MCLG): 1.3 mg/L.
③ · Meaning The 90th-percentile tap result for the 2026-01-01 to 2026-06-30 sampling round was 1.66 mg/L (above the 1.3 mg/L action level).
④ · Where it matters Usually from copper plumbing inside buildings, more where water sits in the pipes.
⑤ · What to do Test your own tap first. To reduce it: Depends on the contaminant (The certifier's listing for each named contaminant).
See the evidence record → Pb Lead (90th percentile) Within reference · Action level 15 µg/L federal action level 2 µg/L ▾ ① · Measured 2 µg/L, sampled 2026–2026 monitoring period (still open). EPA SDWIS (Lead & Copper Rule).
② · Compared 15 µg/L federal action level. EPA health goal (MCLG): 0.
③ · Meaning The 90th-percentile tap result was 2.0 µg/L (below the 15 µg/L action level).
④ · Where it matters Usually from lead service lines, solder and fixtures inside buildings, after the water leaves treatment.
⑤ · What to do Test your own tap first. To reduce it: Lead-certified carbon filter, or reverse osmosis (NSF/ANSI 53 (lead)).
See the evidence record → 29 others tested , none detectedshow 11Cl-PF3OUdS 8:2 FTS 4:2 FTS 6:2 FTS ADONA 9Cl-PF3ONS HFPO-DA (GenX) NEtFOSAA NMeFOSAA NFDHA PFEESA PFMPA PFMBA PFBS PFBA PFDA PFDoA PFHpS PFHpA PFHxS PFHxA PFNA PFOS PFOA PFPeS PFPeA PFTA PFTrDA PFUnA Willmar (EPA PWSID MN1340016) delivers groundwater to 21,991 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
Track record 0 health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
Not in this record Disinfection by-products weren't monitored in this dataset No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Your household Your tap can differ from the city record The record describes water leaving treatment and samples across the system. Pipes, solder and fixtures inside a building can add lead the record can’t see, especially in older buildings with lead service lines.
Test your water City Treated water Measured in this report
Mains Distribution network Sampled across the system
Building Service line and plumbing Not in this record
Tap Your glass Only a tap test measures it
Test first, then treat
Water testing in Willmar, MN
01 Test Know what comes from your tap, starting with a first-draw lead sample.
02 Match Compare each result with its named reference in our test reader .
03 Treat Choose a technology certified for what your test found.
Commercial
Test kits Affiliate links ? As an Amazon Associate, PurityMap earns from qualifying purchases. Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure .
Lab-certified results
ETR Labs Basic Water Quality Test Kit ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Screening: quick check, not lab-grade
Watersafe Drinking Water Test Kit Silver Lake Research
Lead, bacteria, nitrate, copper, iron, chlorine, hardness and pH
Turnaround: Minutes; the bacteria test can take up to 48 hours What it can't tell you: Each test gives a yes/no or a rough range, not a lab number, and it cannot detect PFAS or arsenic.
When your results arrive, read them here → · Compare every kit we list
Minnesota Department of Health certifies the labs that test drinking water in Minnesota. Find a certified lab in Minnesota ↗ · What lab tests cost →
Treatment matching
What can reduce what was found here ? Finding → technology → certification → product, in that order. The reference type carries the meaning; there is no severity score. Finding Reference type Technology Certification to check Lithium 35.7 µg/L Screening level Depends on the contaminant The certifier's listing for each named contaminant Copper (90th percentile) 1.66 mg/L Action level Depends on the contaminant The certifier's listing for each named contaminant Lead (90th percentile) 2 µg/L Action level Lead-certified carbon filter, or reverse osmosis NSF/ANSI 53 (lead)
Understand water treatment technologies →
Commercial Certified for a concern found here Each card names which Willmar findings its current certification covers, and which it doesn't.
As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure .
Water Pitcher
Brita Elite Water Filter Pitcher ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (3) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Water Pitcher
Culligan ZeroWater 10-Cup Pitcher (ZEROP10) ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (3) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names See all 13 products certified for a Willmar concern → Faucet Attachment
PUR Plus Faucet Filter (FM2500V) ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (3) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Under-Sink Filter
Aquasana Claryum 2-Stage Under-Sink Filter (AQ-5200) ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (5) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Anyone who can't plumb, drill or hire an installer Renters who can't modify plumbing Under-Sink Filter
Aquasana Claryum 3-Stage Max Flow Under-Sink Filter (AQ-6300M) ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (5) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Anyone who can't plumb, drill or hire an installer Renters who can't modify plumbing Countertop System
Aquasana Clean Water Machine Countertop Filter (AQ-CWM2) ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (3) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Under-Sink Filter
Frizzlife SP99 Under-Sink Filter ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (4) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Anyone who can't plumb, drill or hire an installer Countertop System
Patriot Pure Ultimate Water Filtration System ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (3) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Countertop System
AquaTru Carafe Countertop Reverse-Osmosis Purifier (AT100) ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (3) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Countertop System
AquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000) ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (3) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Under-Sink Filter
Waterdrop G3P600 Tankless Reverse-Osmosis System ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (5) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Anyone who can't plumb, drill or hire an installer Renters who can't modify plumbing Under-Sink Filter
Waterdrop G3P800 Tankless Reverse-Osmosis System ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (5) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Anyone who can't plumb, drill or hire an installer Renters who can't modify plumbing Refrigerator Filter
Whirlpool Filter 3 Refrigerator Water Filter (WHR3RXD1) ✓ Lead: eligible, evidence match – Not established: Copper (90th percentile), LithiumNot suitable for (3) Treating every tap in the home A whole-home hard-water or scale problem All PFAS: its evidence covers only the compounds it names Lead service lines
Ask your utility first Willmar reported 4 lead and 100 galvanized service lines to replace in EPA’s inventory (2026Q2). Many utilities replace these lines for free or share the cost. Ask Willmar whether your home’s line is on its list before you pay anyone.
Local help
Think your plumbing may be adding lead? Call to be connected with a local plumbing provider about lead service lines, repiping or fixture replacement.
Is this right for my home?
Choose your situation Your situation I live in an older building I care about PFAS My water tastes of chlorine I have scale or hard water I want the broadest reduction
Your path: I live in an older building Lead from plumbing is the main question Older buildings may have lead service lines, solder or fixtures. Willmar’s record shows lead at 2 µg/L (15 µg/L federal action level). Test first-draw water, then filter if needed.
Look for Lead reduction: NSF/ANSI 53 (lead)
How to test your tap →
Your path: I care about PFAS Check what was tested None of the 29 PFAS tested was detected in Willmar’s record. If PFAS matters to you, a filter certification names each compound it covers.
Look for NSF/ANSI 53 or 58, with each compound you care about named on the listing
PFAS in Willmar →
Your path: My water tastes of chlorine The disinfectant is not in this record Most utilities keep chlorine or chloramine in the pipes. A carbon filter certified for taste and odor reduces either; your utility can tell you which it uses.
Look for NSF/ANSI 42 (chlorine taste and odor)
Water treatment technologies →
Your path: I have scale or hard water Hardness is not in this record Your utility’s annual water quality report usually lists hardness; a test strip also measures it.
Look for Softener: NSF/ANSI 44 (softeners)
Hard water explained →
Your path: I want the broadest reduction Reverse osmosis at one tap Reverse osmosis reduces many dissolved contaminants, including lead and minerals, at a single faucet, with some water sent to drain.
Look for NSF/ANSI 58
Compare treatments → Questions
Willmar tap water FAQ Follow Willmar’s water
Get one email when Willmar’s record changes.
? One email when a new sampling round is published, a result moves above or below its reference, or the system's score changes. Follow Willmar’s water → Is Willmar tap water safe to drink? + PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Willmar, no regulated PFAS were detected in EPA's 2024 testing; the lead 90th-percentile result was 2 µg/L against the 15 µg/L action level. Willmar (PWSID MN1340016) has a Purity Score of 73/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap. What we found →
Who provides tap water in Willmar? + Willmar (PWS ID MN1340016) is the public water system on record for Willmar, Minnesota, serving about 21,991 people. Confirm the utility on your water bill before acting on a specific finding. Water utility →
Where does Willmar get its drinking water? + Groundwater (primary source of record in EPA SDWIS). Water utility →
Are PFAS "forever chemicals" in Willmar's water? + None of the 29 PFAS in EPA's UCMR 5 testing (2024-07-30 to 2024-11-20) was detected. "Not detected" means below the lab's reporting limit, not proven zero. What we found →
Is there lead in Willmar's tap water? + Willmar's most recent lead 90th-percentile result (2026) was 2 µg/L, below the 15 µg/L action level. That figure comes from sampled homes; lead usually enters from a building's own pipes and fixtures, so only a test at your tap tells you what you drink. Your household →
What does the latest Willmar water report show? + PurityMap's current record for Willmar holds 32 findings: 2 above a reference, 1 detected within the reference and 29 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass. Records →
Data and sources
32 records, each traceable EPA UCMR 5 EPA SDWIS (Lead & Copper Rule) Contaminant Measured Reference Sampled Source Lithium 35.7 µg/L 10 µg/L EPA health reference level (screening, not a legal limit) 2024 EPA UCMR 5 ↗ (opens in a new tab) Copper (90th percentile) 1.66 mg/L 1.3 mg/L federal action level 2026 EPA SDWIS (Lead & Copper Rule) ↗ (opens in a new tab) Lead (90th percentile) 2 µg/L 15 µg/L federal action level 2026 EPA SDWIS (Lead & Copper Rule) ↗ (opens in a new tab) 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) < 5 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) < 5 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) < 3 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) < 5 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) < 3 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) < 2 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) < 5 ng/L (not detected) 10 ng/L federal MCL (2024) 2024 EPA UCMR 5 ↗ (opens in a new tab) N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) < 5 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) < 6 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) < 20 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) < 3 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluoro-3-methoxypropanoic acid (PFMPA) < 4 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluoro-4-methoxybutanoic acid (PFMBA) < 3 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluorobutanesulfonic acid (PFBS) < 3 ng/L (not detected) 2,000 ng/L EPA health advisory (screening, not a legal limit) 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluorobutanoic acid (PFBA) < 5 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluorodecanoic acid (PFDA) < 3 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluorododecanoic acid (PFDoA) < 3 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluoroheptanesulfonic acid (PFHpS) < 3 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluoroheptanoic acid (PFHpA) < 3 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluorohexanesulfonic acid (PFHxS) < 3 ng/L (not detected) 10 ng/L federal MCL (2024) 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluorohexanoic acid (PFHxA) < 3 ng/L (not detected) 400,000 ng/L Michigan EGLE state MCL (strictest US state) 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluorononanoic acid (PFNA) < 4 ng/L (not detected) 10 ng/L federal MCL (2024) 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluorooctanesulfonic acid (PFOS) < 4 ng/L (not detected) 4.0 ng/L federal MCL (2024) 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluorooctanoic acid (PFOA) < 4 ng/L (not detected) 4.0 ng/L federal MCL (2024) 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluoropentanesulfonic acid (PFPeS) < 4 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluoropentanoic acid (PFPeA) < 3 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluorotetradecanoic acid (PFTA) < 8 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluorotridecanoic acid (PFTrDA) < 7 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab) Perfluoroundecanoic acid (PFUnA) < 2 ng/L (not detected) No federal or state limit; shown for transparency 2024 EPA UCMR 5 ↗ (opens in a new tab)
Showing 5 of 32 records Show all 32 ▾ Show fewer ▴ UCMR5 Analytical Results
UCMR5 Analytical Results: Willmar (MN1340016)
US EPA
Published 2026-10-15 Newest sample 2024-11-20 Findings here 30 View source ↗ Source record
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: Willmar (MN1340016)
US EPA SDWIS
Published 2026-10-13 Newest sample 2026 Findings here 2 View source ↗ Source record
Methodology: how we analyze water . Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Methodology
How PurityMap reads Willmar’s water 01 Source data EPA SDWIS, EPA UCMR 5 and utility reports, each dated and linked.
02 Normalize Units converted to one basis; a non-detect kept distinct from zero.
03 Classify Each result tagged by reference type: MCL, action level, screening level or aesthetic.
04 Compare to the named reference Every value sits against its own reference, never a blended one.
05 Score Measured subjects summarised at the water-system level; an open health-based violation caps the score.
06 Match treatment Treatment is matched to what was found; a product is called certified only when its current certification names it.
What the Purity Score means: a summary of this water system’s published record, capped while a health-based violation is open. It is not a test of any tap. Willmar · PWSID MN1340016 · Purity Score 73/100 (Fair) · Confidence: moderate · Assessed at the water-system level
Full methodology → Something off with your water's smell, color or taste? Start with the hot-or-cold tap check. Where Willmar reported something related, it's shown below.
More Willmar water intelligence Nearby city reports
