Public water system · OH8641912
ActiveNorthwest Water District Pws
At a glance
Northwest Water District Pws (PWSID OH8641912) is an active non-transient non-community water system in Williams County, Ohio. It reports serving 1,100 people through 6 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,100
Service connections
6
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Northwest Water District Pws compare with other water systems in Williams County?
By EPA's size categories, Northwest Water District Pws is a small system (501 to 3,300 people). Williams County has 43 active public water systems. Its population served is about 75% above the county average of 628 people per system, and accounts for 4.1% of the 27,007 people reported by systems filed under the county. Across Ohio, the 3,854 active systems average 2,767 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Northwest Water District Pws is about 156% above that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Ohio has 544 active non-transient non-community water systems, 14% of the state's 3,854 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,446 Ohio systems (89%) list groundwater as their primary source.
Who owns and regulates Northwest Water District Pws?
EPA lists Northwest Water District Pws as privately owned. The OH state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 35 of the 43 active systems in Williams County (81%) are also privately owned.
Does Northwest Water District Pws have drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2025. The violations listed here began between July 2017 and July 2025. By type: 3 monitoring and reporting, 1 required treatment not met and 1 monitoring. The contaminant or rule involved most often is Lead and Copper Rule (4 of them). EPA lists 4 as resolved and 1 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 |
|---|---|---|---|---|
| 2025-07-01 | Required treatment not metWQP Entry Point/Tap Treatment Technique Non-Compliance · code 59 | Lead and Copper Rulecode 5000 | Yes | Archived |
| 2022-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-01-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2019-07-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-07-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
All 5 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.
Northwest Water District Pws: frequently asked questions
Who runs Northwest Water District Pws?
Northwest Water District Pws (PWSID OH8641912) is a non-transient non-community water system privately owned. It is regulated by the OH state drinking water program.
How many people does Northwest Water District Pws serve?
Northwest Water District Pws reports serving 1,100 people through 6 service connections in Williams County, Ohio.
Where does Northwest Water District Pws 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 Northwest Water District Pws have any drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2025. 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 Northwest Water District Pws' 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 5 violations for this system; 1 is health-based, and the most recent began in July 2025. For current results, consult EPA ECHO, or the OH state drinking water program.
Where can I find Northwest Water District Pws' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Northwest Water District Pws is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Williams County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Bryan City Pws | Williams | 8,729 | Community | Groundwater |
| Montpelier Village | Williams | 4,280 | Community | Groundwater |
| Edgerton Village | Williams | 1,881 | Community | Groundwater |
| West Unity Village | Williams | 1,760 | Community | Groundwater |
| Pioneer Village | Williams | 1,449 | Community | Groundwater |
| Stryker Village | Williams | 1,259 | 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, “Northwest Water District Pws, PWSID OH8641912, Ohio”, https://aquacensus.com/water-systems/ohio/northwest-water-district-pws-oh8641912 (data as of October 1, 2026).