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Richland County, Montana — public water systems

At a glance

16 active public water systems are filed under Richland County, Montana in EPA's SDWIS records, together reporting 7,074 people served. The largest is City of Sidney, which reports serving 5,000 people. 5 are community water systems serving people where they live; the other 11 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.

Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

16

Population served

7.1K

Community systems

5

Groundwater share

100%

How does Richland County compare with other Montana counties?

Richland County has the 30th-most active public water systems among the 76 counties listed for active Montana systems in EPA records; among the 55 with 3 or more systems, the median has 16. Its systems report 7,074 people served in total, the 30th-largest county figure in the state and 0.6% of the statewide total. The average system here reports serving 442 people, roughly in line with the Montana average of 489. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does Richland County's drinking water come from?

By primary water source, Richland County's active systems draw on groundwater (13, 81%) and purchased groundwater (3, 19%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 89% and 11% across Montana. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, City of Sidney, draws primarily on groundwater.

What kinds of water systems operate in Richland County?

Richland County's active systems break down as 5 community systems (31%), 3 non-transient non-community systems (19%) and 8 transient non-community systems (50%). 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. 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. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (63%) and local government (38%).

Water systems in Richland County

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Active public water systems in Richland County, Montana
#Water systemCountyPopulation servedTypeSource
1Sidney City ofRichland5,000CommunityGroundwater
2Fairview Town ofRichland1,000CommunityGroundwater
3Redwood Park Work Camp Phase 1Richland150Transient non-communityGroundwater
4Lambert Sewer and Water AssnRichland150CommunityGroundwater
5Sidney Richland County Airport UnapproveRichland115Transient non-communityGroundwater
6Savage Public SchoolRichland114Non-transient non-communityGroundwater
7Cattlemen'S CafeRichland100Transient non-communityGroundwater
8Richland Co Valley View WuaRichland85CommunityGroundwater
9Rau School District No 21Richland80Non-transient non-communityGroundwater
10Valley Fuel and SupplyRichland75Transient non-communityGroundwater
11Central Water ConditioningRichland50Non-transient non-communityPurchased groundwater
12Mount Pleasant EstatesRichland45CommunityGroundwater
13America First Rvp LLCRichland30Transient non-communityPurchased groundwater
14Four Seasons Trailer CourtRichland30Transient non-communityGroundwater
15Reynolds Market SidneyRichland25Transient non-communityPurchased groundwater
16Sidney Gymnastics ClubRichland25Transient non-communityGroundwater

Richland County water systems: frequently asked questions

How many public water systems are in Richland County, Montana?

EPA's SDWIS records file 16 active public water systems under Richland County, Montana: 5 community systems (31%), 3 non-transient non-community systems (19%) and 8 transient non-community systems (50%).

Who supplies drinking water in Richland County, MT?

The largest community water systems filed under Richland County are City of Sidney (5,000 people served), Town of Fairview (1,000 people served) and Lambert Sewer and Water Assn (150 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.

Does Richland County's drinking water come from groundwater or surface water?

Of the 16 active public water systems in Richland County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, City of Sidney, uses groundwater.

Where can I find a water quality report for Richland County?

Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 5 community systems are filed under Richland County, so the report to look for is the one from the system that supplies your address.

How can I check violations for a water system in Richland County?

Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.

More Montana water systems

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, “Public water systems in Richland County, Montana”, https://aquacensus.com/water-systems/montana/richland (data as of October 1, 2026).