Public water system · MO4010701
ActiveGrayhawk Water
At a glance
Grayhawk Water (PWSID MO4010701) is an active community water system in Ste. Genevieve County, Missouri. It reports serving 750 people through 314 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
750
Service connections
314
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Grayhawk Water compare with other water systems in Ste. Genevieve County?
By EPA's size categories, Grayhawk Water is a small system (501 to 3,300 people). Ste. Genevieve County has 17 active public water systems, and Grayhawk Water is the 4th-largest of them by population served. Its population served is roughly in line with the county average of 812 people per system, and accounts for 5.4% of the 13,798 people reported by systems filed under the county. Across Missouri, the 2,943 active systems average 2,049 people each. Nationally, the average active community water system reports serving 6,703 people, so Grayhawk Water is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Missouri has 1,612 active community water systems, 55% of the state's 2,943 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,521 Missouri systems (86%) list groundwater as their primary source.
Who owns and regulates Grayhawk Water?
EPA lists Grayhawk Water as privately owned. The MO state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 11 of the 17 active systems in Ste. Genevieve County (65%) are also privately owned.
Does Grayhawk Water have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2024. The violations listed here began between May 1995 and October 2024. By type: 3 monitoring and reporting, 2 public notice, recordkeeping or other and 1 reporting. The contaminant or rule involved most often is Consumer Confidence Rule (2 of them). EPA lists 6 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2024-10-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2020-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2002-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 6 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Grayhawk Water: frequently asked questions
Who runs Grayhawk Water?
Grayhawk Water (PWSID MO4010701) is a community water system privately owned. It is regulated by the MO state drinking water program.
How many people does Grayhawk Water serve?
Grayhawk Water reports serving 750 people through 314 service connections in Ste. Genevieve County, Missouri.
Where does Grayhawk Water get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Grayhawk Water have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Grayhawk Water's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find Grayhawk Water's water quality report?
As a community water system, Grayhawk Water must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Ste. Genevieve County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ste Genevieve Pws | Ste. Genevieve | 4,999 | Community | Groundwater |
| Ste Genevieve County Pwsd 1 Sc | Ste. Genevieve | 3,718 | Community | Groundwater |
| Ste Genevieve County Pwsd 1 North | Ste. Genevieve | 1,287 | Community | Groundwater |
| Lake Forest Estates | Ste. Genevieve | 650 | Community | Groundwater |
| Bloomsdale Pws | Ste. Genevieve | 639 | Community | Groundwater |
| Lake Seven Falls Assn Inc. | Ste. Genevieve | 475 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Grayhawk Water, PWSID MO4010701, Missouri”, https://aquacensus.com/water-systems/missouri/grayhawk-water-mo4010701 (data as of October 1, 2026).