Public water system · SD4600053

Active

Terry Trojan Water District

At a glance

Terry Trojan Water District (PWSID SD4600053) is an active community water system in Lawrence County, South Dakota. It reports serving 400 people through 220 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2011.

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

Population served

400

Service connections

220

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDSD4600053

System typeCommunity water system

Activity statusActive

Population served400

Service connections220

Primary water sourceGroundwater

Owner typePrivate

Primacy agencySD state drinking water program

City servedBlack Hawk

StateSouth Dakota

ZIP57718

CountyLawrence County

How does Terry Trojan Water District compare with other water systems in Lawrence County?

By EPA's size categories, Terry Trojan Water District is a very small system (500 people or fewer). Lawrence County has 73 active public water systems. Its population served is roughly in line with the county average of 373 people per system, and accounts for 1.5% of the 27,194 people reported by systems filed under the county. Across South Dakota, the 699 active systems average 1,387 people each. Nationally, the average active community water system reports serving 6,703 people, so Terry Trojan Water District 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. South Dakota has 510 active community water systems, 73% of the state's 699 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 431 South Dakota systems (62%) list groundwater as their primary source.

Who owns and regulates Terry Trojan Water District?

EPA lists Terry Trojan Water District as privately owned. The SD state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 60 of the 73 active systems in Lawrence County (82%) are also privately owned.

Does Terry Trojan Water District have drinking water violations?

Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2011. The violations listed here began between April 2006 and October 2011. By type: 5 monitoring and reporting, 5 contaminant level above the legal limit and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Arsenic (5 of them). 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
2011-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2008-04-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2008-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Arseniccode 1005	Yes	Resolved
2007-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Arseniccode 1005	Yes	Resolved
2007-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Arseniccode 1005	Yes	Resolved
2007-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Arseniccode 1005	Yes	Resolved
2007-01-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2007-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Arseniccode 1005	Yes	Resolved
2006-04-01	Monitoring and reportingMonitoring, Regular · code 03	Chlordanecode 2959	No	Resolved
2006-04-01	Monitoring and reportingMonitoring, Regular · code 03	Methoxychlorcode 2015	No	Resolved
2006-04-01	Monitoring and reportingMonitoring, Regular · code 03	Lindane (gamma-BHC)code 2010	No	Resolved
2006-04-01	Monitoring and reportingMonitoring, Regular · code 03	Ethylene dibromide (EDB)code 2946	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.

Terry Trojan Water District: frequently asked questions

Who runs Terry Trojan Water District?

Terry Trojan Water District (PWSID SD4600053) is a community water system privately owned. It is regulated by the SD state drinking water program.

How many people does Terry Trojan Water District serve?

Terry Trojan Water District reports serving 400 people through 220 service connections in Lawrence County, South Dakota.

Where does Terry Trojan Water District 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 Terry Trojan Water District have any drinking water violations?

Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2011. 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 Terry Trojan Water District'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, 5 are health-based, and the most recent began in October 2011. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.

Where can I find Terry Trojan Water District's water quality report?

As a community water system, Terry Trojan Water District 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 Lawrence County

Water system	County	Population served	Type	Source
Spearfish	Lawrence	13,803	Community	Groundwater
Lead	Lawrence	2,982	Community	Purchased surface water
Deadwood	Lawrence	1,156	Community	Purchased surface water
Whitewood	Lawrence	879	Community	Groundwater
Guadalajara Mexican Restaurant	Lawrence	630	Transient non-community	Groundwater
Spearfish Canyon Resort LLC	Lawrence	492	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, “Terry Trojan Water District, PWSID SD4600053, South Dakota”, https://aquacensus.com/water-systems/south-dakota/terry-trojan-water-district-sd4600053 (data as of October 1, 2026).