Prowers County, Colorado — public water systems
At a glance
10 active public water systems are filed under Prowers County, Colorado in EPA's SDWIS records, together reporting 11,670 people served. The largest is City of Lamar, which reports serving 7,500 people. All 10 are community water systems serving people where they live.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
10
Population served
11.7K
Community systems
10
Groundwater share
100%
How does Prowers County compare with other Colorado counties?
Prowers County has the 47th-most active public water systems among the 113 counties listed for active Colorado systems in EPA records; among the 65 with 3 or more systems, the median has 18. Its systems report 11,670 people served in total, the 41st-largest county figure in the state and 0.2% of the statewide total. The average system here reports serving 1,167 people, about 66% below the Colorado average of 3,400. 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 Prowers County's drinking water come from?
By primary water source, Prowers County's active systems draw on groundwater (9, 90%) and purchased groundwater (1, 10%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 74% and 26% across Colorado. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, City of Lamar, draws primarily on groundwater.
What kinds of water systems operate in Prowers County?
Prowers County's active systems break down as 10 community systems (100%). 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. EPA lists their owner types as local government (60%) and private (40%).
Water systems in Prowers County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Lamar City of | Prowers | 7,500 | Community | Groundwater |
| 2 | May Valley Wa | Prowers | 1,500 | Community | Groundwater |
| 3 | Holly Town of | Prowers | 800 | Community | Groundwater |
| 4 | Granada Town of | Prowers | 515 | Community | Groundwater |
| 5 | Wiley Town of | Prowers | 405 | Community | Groundwater |
| 6 | Granada Rural Water Authority | Prowers | 378 | Community | Groundwater |
| 7 | Prosperity Lane Wa | Prowers | 260 | Community | Purchased groundwater |
| 8 | Bristol Wsd | Prowers | 151 | Community | Groundwater |
| 9 | A and B Wa Inc. | Prowers | 100 | Community | Groundwater |
| 10 | Hartman Town of | Prowers | 61 | Community | Groundwater |
Prowers County water systems: frequently asked questions
How many public water systems are in Prowers County, Colorado?
EPA's SDWIS records file 10 active public water systems under Prowers County, Colorado: 10 community systems (100%).
Who supplies drinking water in Prowers County, CO?
The largest community water systems filed under Prowers County are City of Lamar (7,500 people served), May Valley Wa (1,500 people served) and Town of Holly (800 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 Prowers County's drinking water come from groundwater or surface water?
Of the 10 active public water systems in Prowers County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, City of Lamar, uses groundwater.
Where can I find a water quality report for Prowers 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. 10 community systems are filed under Prowers 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 Prowers 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 Colorado 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 Prowers County, Colorado”, https://aquacensus.com/water-systems/colorado/prowers (data as of October 1, 2026).