01The verdict: is Bonnots Mill water safe?
Bonnots Mill's drinking water has significant quality concerns based on EPA testing data. With a grade of B (76.2/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,221 residents using groundwater (wells).
4 unresolved violations on record
EPA records show open compliance items for this system. Most are administrative, but unresolved items are worth watching.
See what was cited ↓Lead is well under the limit
90th-percentile lead is 3.2 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓12 violations in the last five years
Recent compliance history is the best predictor of future problems — the year-by-year record is below.
See the record ↓Bonnots Mill's drinking water received a grade of B (76.2 out of 100), indicating good water quality. The city's 1 water system serves approximately 1,221 residents using groundwater.
Lead levels were measured at 3.2 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program. The system has 18 violations on record, including 0 health-based violations. 4 remain unresolved.
Bonnots Mill ranks #342 out of 487 cities in Missouri for water quality, placing it below average in the state. Bonnots Mill relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff. As a small community water system, Bonnots Mill may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities. The system has seen 12 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
02What's in Bonnots Mill's water
Every contaminant flagged in Bonnots Mill, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 3.2 | 15 | ppb | Inorganic | Safe |
Cities ranked by 90th-percentile lead PF PFAS in Missouri
Cities ranked by compounds detected Cu Copper in Missouri
Cities ranked by 90th-percentile copper
03Bonnots Mill's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 18 violations on record, including 0 health-based violations. 4 remain unresolved.
8 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
▲ Up 3.2 ppb since 1993. Latest reading: 3.2 ppb (2025) — 21% of the action level. Sampled at higher-risk homes (90th percentile).
04Where Bonnots Mill's water comes from
Bonnots Mill's drinking water is drawn from underground aquifers through wells.
Groundwater
Underground aquifers reached by wells — naturally filtered, but can carry minerals like arsenic and nitrate.
Local treatment
Groundwater generally needs less treatment — typically disinfection and, where needed, mineral removal.
1 system
1 water system, operated under local government ownership.
1,221 people
Residents served across Bonnots Mill's service area.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals. Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds. The system is operated by local government ownership and serves approximately 1,221 people through 1 water system.
| System name | PWSID | Population | Source |
|---|---|---|---|
| OSAGE CO PWSD 1 | MO3024437 | 1,221 | Groundwater |
Water bodies near Bonnots Mill
These water bodies shape the regional watershed and can indirectly affect groundwater quality.
05Pressure on Bonnots Mill's watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Flood & storm history
7 federal disaster declarations on record for Osage County. Flooding and severe storms can overwhelm treatment plants, cause sewage overflows, and push runoff into supplies.
06How Bonnots Mill compares
Scores for nearby Missouri cities on one line, with the average marked.
dashed line = Missouri average (67/100)
Bonnots Mill scores 76.2/100 — above the Missouri average of 67/100. It outscores 5 of 10 nearby cities. Full Missouri rankings →
74.8 / 100BKansas City, MO
79.2 / 100FSpringfield, MO
37.1 / 100CColumbia, MO
61.4 / 100FO Fallon, MO
43.4 / 100FDes Peres, MO
36.6 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
07What to do at home
Steps matched to what testing actually found in Bonnots Mill's water — not generic advice.
A basic carbon filter still helps
Bonnots Mill's water meets federal standards, but a simple carbon filter improves taste and adds a margin of safety against short-term issues.
Compare tested filters →Flush taps & check your service line
Lead leaches from pipes as water sits. Run cold water 30 seconds before drinking (especially mornings), and ask the utility whether your address still has a lead service line.
Lead risks explained →Watch for Bonnots Mill alerts
This area has a history of flood declarations — after severe weather, watch for boil-water advisories from the utility, and check the live alerts on this page.
All water alerts →Frequently asked questions
Is Bonnots Mill, MO tap water safe to drink?
Bonnots Mill's water quality earned a grade of B (76.2/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #342 out of 487 cities tested in Missouri.
What contaminants are in Bonnots Mill's water?
Lead was measured at 3.2 ppb (90th percentile). 18 violations are on record.
How is Bonnots Mill's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Bonnots Mill?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Bonnots Mill's water come from?
Bonnots Mill's water is sourced from Groundwater. The city has 1 water system serving approximately 1,221 residents.
Is Bonnots Mill's groundwater at risk of contamination?
Bonnots Mill uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 18 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Bonnots Mill's water compare to other cities?
Bonnots Mill ranks #342 out of 487 cities in Missouri (better than 30% of state cities) and #9263 out of 15382 cities nationally (40th percentile). The grade of B reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Bonnots Mill's small water system affect quality?
Bonnots Mill's system serves approximately 1,221 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 18 violations on record.