Public water system · FL3594107
ActiveSeminole County Northwest
At a glance
Seminole County Northwest (PWSID FL3594107) is an active community water system in Seminole County, Florida. It reports serving 31,986 people through 9,490 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in July 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
31,986
Service connections
9,490
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Seminole County Northwest compare with other water systems in Seminole County?
By EPA's size categories, Seminole County Northwest is a large system (10,001 to 100,000 people). Seminole County has 60 active public water systems. Its population served is about 3.8 times the county average of 8,505 people per system, and accounts for 6.3% of the 510,279 people reported by systems filed under the county. Across Florida, the 5,197 active systems average 4,345 people each. Nationally, the average active community water system reports serving 6,703 people, so Seminole County Northwest is about 4.8 times 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. Florida has 1,640 active community water systems, 32% of the state's 5,197 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 4,996 Florida systems (96%) list groundwater as their primary source.
Who owns and regulates Seminole County Northwest?
EPA lists Seminole County Northwest as owned by a local government. The FL state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 20 of the 60 active systems in Seminole County (33%) are also owned by a local government.
Does Seminole County Northwest have drinking water violations?
EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in July 2023. The violations listed here began between August 1991 and July 2023. By type: 5 contaminant level above the legal limit, 3 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 5 as resolved and 5 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2023-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2023-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2023-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2018-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2006-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2004-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2004-03-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2003-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2000-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1991-08-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 10 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.
Seminole County Northwest: frequently asked questions
Who runs Seminole County Northwest?
Seminole County Northwest (PWSID FL3594107) is a community water system owned by a local government. It is regulated by the FL state drinking water program.
How many people does Seminole County Northwest serve?
Seminole County Northwest reports serving 31,986 people through 9,490 service connections in Seminole County, Florida.
Where does Seminole County Northwest 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 Seminole County Northwest have any drinking water violations?
EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in July 2023. 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 Seminole County Northwest'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 10 violations for this system; 5 are health-based, and the most recent began in July 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the FL state drinking water program.
Where can I find Seminole County Northwest's water quality report?
As a community water system, Seminole County Northwest 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 Seminole County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Sanford, City of (2 Wps) | Seminole | 79,715 | Community | Groundwater |
| Seminole County Southeast | Seminole | 70,040 | Community | Groundwater |
| Casselberry, City of (3 Wps) | Seminole | 54,747 | Community | Groundwater |
| Altamonte Springs Water Dept (2 Wps) | Seminole | 51,000 | Community | Groundwater |
| Oviedo, City of | Seminole | 47,933 | Community | Groundwater |
| Sanlando (3 Wtps) | Seminole | 36,953 | 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, “Seminole County Northwest, PWSID FL3594107, Florida”, https://aquacensus.com/water-systems/florida/seminole-county-northwest-fl3594107 (data as of October 1, 2026).