The Knolls
EPA ID: MO3252255 · 725 people served · 1 ZIP code
ZipCheckup's reading of EPA records for The Knolls (MO3252255): 3 violations recorded with unresolved status in the SDWIS data used. Open violations at The Knolls number 3 in the EPA compliance data, for a system that serves about 725 people. An open status describes how each violation is logged in the federal record; it is not a measurement of what comes out of any individual tap.
Data: EPA SDWIS
Service Area Map
Coverage area for The Knolls Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with The Knolls have a median household income of $57,133 and about 6,730 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 52% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 45% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
The Knolls's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Wastewater Proximity Note: This service area ranks in the 60th percentile nationally for proximity to wastewater discharge points.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Missouri
System Overview
The Knolls (EPA ID: MO3252255) is a community water system in Missouri that serves approximately 725 people from groundwater sources.
This system serves ZIP code 65065 in Osage Beach.
Violation History
Status breakdown for accepted records with record years 2021-2026: 2 resolved, 0 archived, 0 addressed, and 3 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| January 1, 2026 | Revised Total Coliform Rule | Non-health-based | Unaddressed (current) |
| December 30, 2025 | Lead and Copper Rule | Non-health-based | Unaddressed (current) |
| July 1, 2025 | Consumer Confidence Rule | Non-health-based | Unaddressed (current) |
| October 17, 2024 | LEAD AND COPPER RULE REVISIONS | Non-health-based | Resolved |
| July 1, 2023 | Consumer Confidence Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Rule | Other (notice or report rule) | 2 | No |
| Lead and Copper Rule | Monitoring & Reporting | 1 | No |
| LEAD AND COPPER RULE REVISIONS | Monitoring & Reporting | 1 | No |
| Revised Total Coliform Rule | Monitoring & Reporting | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0071 mg/L | No | 2025-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by MO or modeled from parcel and building-footprint data.
- 65065 - Osage Beach
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for The Knolls (MO3252255) on EPA.gov.
Frequently Asked Questions
Is The Knolls water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 3 current noncompliance records and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does The Knolls serve?
The Knolls serves approximately 725 people across 1 ZIP code in Missouri.
Where does The Knolls get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). The Knolls (MO): 5 EPA Violations. https://zipcheckup.com/water-system/mo3252255/
@misc{zipcheckup-water-system-mo3252255,
author = {{ZipCheckup}},
title = {{The Knolls (MO): 5 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/mo3252255/}
}
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
The Knolls (EPA ID: MO3252255) - request the latest Consumer Confidence Report or ask about specific contaminants.