Drinking water quality · 2025
What's in Lees Summit, MO tap water
23 contaminants were measured in the Lees Summit, MO water system's 2025 annual report. Each is shown below against its federal limit.
- Reporting year
- 2025
- Contaminants measured
- 23
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- MO
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound detected in Lees Summit, MO
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFBA
● Detected (no federal limit)Where your water comes from · EPA SDWIS
Lees Summit, MO buys its drinking water from INDEPENDENCE PWS, KANSAS CITY PWS, and 3 more.
Source
Treatment
Distribution
Also buys water from INDEPENDENCE PWS, KANSAS CITY PWS, and 3 more.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 2 ng/LMaximumSampled Result | None set | Within the limit |
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 2 ng/LReported levelWater System Name | None set | Within the limit |
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 2Reported levelWater System Name | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.75 mg/LHighest single sampleSample Result | 4 mg/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 25 mg/LMaximumSampled Result | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 178 mg/LMaximumSampled Result | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Nitrate Nitrite | 0.926 mg/LHighest single sampleSample Result | 10 mg/LMCL | Within the limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AtrazineA widely used agricultural herbicide that reaches water through runoff. | 0.267 ug/LHighest single sampleSample Result | None set | Within the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 7 ug/LRunning annual avgSystem-wide | None set | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SeleniumA trace element from natural deposits and industrial discharge. | 1.95 ug/LHighest single sampleSample Result | None set | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.0127 mg/LHighest single sampleSample Result | 2 mg/LMCL | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.006 mg/L90th percentile90th Percentile: 90% of your water utility levels were less than | 1.3 mg/LAction level | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0 ug/L90th percentile90th Percentile: 90% of your water utility levels were less than | None set | None detected |
| CalciumA naturally occurring mineral that contributes to water hardness. | 16.4 mg/LMaximumSampled Result | None set | Detected — no federal limit |
| LithiumA naturally occurring element found in some groundwater. | 58.6 ug/LMaximumSampled Result | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 19.9 mg/LMaximumSampled Result | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 6 mg/LMaximumSampled Result | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 50 mg/LMaximumSampled Result | None set | Detected — no federal limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0.96 %Reported levelSystem-wide | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 216 mg/LMaximumSampled Result | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 123 mg/LMaximumSampled Result | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 9.65MaximumSampled Result | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 340 mg/LMaximumSampled Result | None set | Detected — no federal limit |
People also ask about Lees Summit, MO's water
+Is Lees Summit, MO tap water safe to drink in 2025?
Every one of the 23 contaminants measured in Lees Summit, MO's 2025 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Lees Summit, MO tap water?
23 contaminants were measured in Lees Summit, MO's 2025 Consumer Confidence Report, spanning metals, physical & aggregate, and inorganic chemicals. 4 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Lees Summit, MO's 2025 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Lees Summit, MO's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2025 report; a new report will replace it once the utility publishes its next annual update.