Public water system · MT0001451

Active

Jim Darcy School District No 1

At a glance

Jim Darcy School District No 1 (PWSID MT0001451) is an active non-transient non-community water system in Lewis and Clark County, Montana. It reports serving 575 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2025.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

575

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDMT0001451

System typeNon-transient non-community water system

Activity statusActive

Population served575

Service connections2

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyMT state drinking water program

City servedHelena

StateMontana

ZIP—

CountyLewis and Clark County

How does Jim Darcy School District No 1 compare with other water systems in Lewis and Clark County?

By EPA's size categories, Jim Darcy School District No 1 is a small system (501 to 3,300 people). Lewis and Clark County has 165 active public water systems. Its population served is about 39% above the county average of 413 people per system, and accounts for 0.8% of the 68,071 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Jim Darcy School District No 1 is about 34% 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. Montana has 319 active non-transient non-community water systems, 13% of the state's 2,378 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,994 Montana systems (84%) list groundwater as their primary source.

Who owns and regulates Jim Darcy School District No 1?

EPA lists Jim Darcy School District No 1 as owned by a local government. The MT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 10 of the 165 active systems in Lewis and Clark County (6.1%) are also owned by a local government.

Does Jim Darcy School District No 1 have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2025. The violations listed here began between October 2019 and April 2025. By type: 12 monitoring and reporting. The contaminants or rules involved are Nitrate-Nitrite, 2,4-D, Hexachlorobenzene and Lindane (gamma-BHC). EPA lists 12 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
2025-04-01	Monitoring and reportingMonitoring, Regular · code 03	Nitrate-Nitritecode 1038	No	Resolved
2019-10-01	Monitoring and reportingMonitoring, Regular · code 03	2,4-Dcode 2105	No	Resolved
2019-10-01	Monitoring and reportingMonitoring, Regular · code 03	Hexachlorobenzenecode 2274	No	Resolved
2019-10-01	Monitoring and reportingMonitoring, Regular · code 03	Lindane (gamma-BHC)code 2010	No	Resolved
2019-10-01	Monitoring and reportingMonitoring, Regular · code 03	Atrazinecode 2050	No	Resolved
2019-10-01	Monitoring and reportingMonitoring, Regular · code 03	Alachlor (Lasso)code 2051	No	Resolved
2019-10-01	Monitoring and reportingMonitoring, Regular · code 03	2,4,5-TP (Silvex)code 2110	No	Resolved
2019-10-01	Monitoring and reportingMonitoring, Regular · code 03	Dinosebcode 2041	No	Resolved
2019-10-01	Monitoring and reportingMonitoring, Regular · code 03	Picloramcode 2040	No	Resolved
2019-10-01	Monitoring and reportingMonitoring, Regular · code 03	Di(2-ethylhexyl) phthalatecode 2039	No	Resolved
2019-10-01	Monitoring and reportingMonitoring, Regular · code 03	Carbofurancode 2046	No	Resolved
2019-10-01	Monitoring and reportingMonitoring, Regular · code 03	Di(2-ethylhexyl) adipatecode 2035	No	Resolved

The 12 most recent 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.

Jim Darcy School District No 1: frequently asked questions

Who runs Jim Darcy School District No 1?

Jim Darcy School District No 1 (PWSID MT0001451) is a non-transient non-community water system owned by a local government. It is regulated by the MT state drinking water program.

How many people does Jim Darcy School District No 1 serve?

Jim Darcy School District No 1 reports serving 575 people through 2 service connections in Lewis and Clark County, Montana.

Where does Jim Darcy School District No 1 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 Jim Darcy School District No 1 have any drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 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 Jim Darcy School District No 1'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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2025. For current results, consult EPA ECHO, or the MT state drinking water program.

Where can I find Jim Darcy School District No 1's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Jim Darcy School District No 1 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 Lewis and Clark County

Water system	County	Population served	Type	Source
Helena Water System	Lewis and Clark	32,091	Community	Surface water
East Helena City of	Lewis and Clark	2,114	Community	Groundwater
Eastgate Village Sewer and Water	Lewis and Clark	2,000	Community	Groundwater
Va Medical Center Helena	Lewis and Clark	1,275	Community	Purchased surface water
Helena Leisure LLC	Lewis and Clark	1,200	Community	Groundwater
Bobs Valley Service Inc.	Lewis and Clark	1,032	Non-transient non-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, “Jim Darcy School District No 1, PWSID MT0001451, Montana”, https://aquacensus.com/water-systems/montana/jim-darcy-school-district-no-1-mt0001451 (data as of October 1, 2026).