Public water system · WY5600603
ActiveWilliams Field Services-Opal
At a glance
Williams Field Services-Opal (PWSID WY5600603) is an active non-transient non-community water system in Lincoln County, Wyoming. It reports serving 41 people through 4 service connections. Its primary water source is purchased groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
41
Service connections
4
Primary source
GWP
Purchased groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Williams Field Services-Opal compare with other water systems in Lincoln County?
By EPA's size categories, Williams Field Services-Opal is a very small system (500 people or fewer). Lincoln County has 44 active public water systems. Its population served is well below the county average of 438 people per system, and accounts for 0.2% of the 19,264 people reported by systems filed under the county. Across Wyoming, the 775 active systems average 838 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Williams Field Services-Opal is well below 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. Wyoming has 91 active non-transient non-community water systems, 12% of the state's 775 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 36 Wyoming systems (4.6%) list purchased groundwater as their primary source.
Who owns and regulates Williams Field Services-Opal?
EPA lists Williams Field Services-Opal as privately owned. The WY state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 22 of the 44 active systems in Lincoln County (50%) are also privately owned.
Does Williams Field Services-Opal have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2015. The violations listed here began between January 2000 and January 2015. By type: 10 monitoring and reporting and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 11 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 |
|---|---|---|---|---|
| 2015-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2014-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2003-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | 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.
Williams Field Services-Opal: frequently asked questions
Who runs Williams Field Services-Opal?
Williams Field Services-Opal (PWSID WY5600603) is a non-transient non-community water system privately owned. It is regulated by the WY state drinking water program.
How many people does Williams Field Services-Opal serve?
Williams Field Services-Opal reports serving 41 people through 4 service connections in Lincoln County, Wyoming.
Where does Williams Field Services-Opal get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Williams Field Services-Opal have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2015. 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 Williams Field Services-Opal'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, 2 are health-based, and the most recent began in January 2015. For current results, consult EPA ECHO, or the WY state drinking water program.
Where can I find Williams Field Services-Opal's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Williams Field Services-Opal 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 Lincoln County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kemmerer-Diamondville Jpb | Lincoln | 3,348 | Community | Surface water |
| Star Valley Ranch, Town of | Lincoln | 2,030 | Community | Groundwater |
| Afton, Board of Pub Utilities | Lincoln | 2,000 | Community | Groundwater |
| Leisure Valley Inc./ Star Valley Rv Park | Lincoln | 1,910 | Community | Groundwater |
| Alpine, Town of | Lincoln | 1,300 | Community | Groundwater |
| Wy Dot-Star Valley Rest Area | Lincoln + 1 more | 1,260 | 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, “Williams Field Services-Opal, PWSID WY5600603, Wyoming”, https://aquacensus.com/water-systems/wyoming/williams-field-services-opal-wy5600603 (data as of October 1, 2026).