Non-Transient Non-Community Water System · PWS CO0226838

Mountain Coal Co LLC West Elk Mine

Somerset, Colorado 81434 - drinking water served from surface water sources to 300 people, tracked in EPA SDWIS and UCMR5.

Compiled by PlainWater Editorial, Drinking Water Quality Editorial Team · May 15, 2026

300
People served: 212
EPA violations: 0
Health-based: Untested
UCMR5 result

The verdict

EPA records 212 drinking-water violations at Mountain Coal Co LLC West Elk Mine - above the Colorado per-system average.

212
Total EPA violations on record: 0%
Health-based (MCL / treatment failure): 300
People served by this system: N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Mountain Coal Co LLC West Elk Mine

Mountain Coal Co LLC West Elk Mine is a private-owned non-transient non-community water system that delivers drinking water to 300 residents in Somerset, Colorado (Gunnison County) through 7 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 212 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 212 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Diquat, recorded in 8 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Colorado, EPA tracks 2,193 public water systems serving 7,473,456 people, with 238,796 cumulative violations and 30,589 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 108.9 violations. Statewide, 98 of 163 UCMR5-tested systems have reported PFAS detections (60.1%).

Mountain Coal Co LLC West Elk Mine's 212 violations sit above the Colorado average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served

300

Total Violations

212

Health-Based Violations

Water Source

Surface Water

System Details

System Type: Non-Transient Non-Community
Owner Type: Private
Connections: 7
County: Gunnison
School/Daycare: No
MCL Violations: 0
Monitoring Violations: 212
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Diquat	MR	8	2011
OXAMYL	MR	8	2011
Carbofuran	MR	8	2011
Methoxychlor	MR	7	2011
Lead and Copper Rule	MR	7	2025
BHC-GAMMA	MR	4	2011
Di(2-ethylhexyl) adipate	MR	4	2011
Di(2-ethylhexyl) phthalate	MR	4	2011
Picloram	MR	4	2011
Dinoseb	MR	4	2011
Aldicarb sulfone	MR	4	2011
Aldicarb	MR	4	2011
Atrazine	MR	4	2011
LASSO	MR	4	2011
Heptachlor	MR	4	2011
Benzo(a)pyrene	MR	4	2011
Pentachlorophenol	MR	4	2011
Total Polychlorinated Biphenyls (PCB)	MR	4	2011
1,2-DIBROMO-3-CHLOROPROPANE	MR	4	2011
ETHYLENE DIBROMIDE	MR	4	2011
Chlordane	MR	4	2011
Heptachlor epoxide	MR	4	2011
HEXACHLOROBENZENE	MR	4	2011
Endrin	MR	4	2011
Aldicarb sulfoxide	MR	4	2011
Toxaphene	MR	4	2011
Hexachlorocyclopentadiene	MR	4	2011
2,4,5-TP	MR	4	2011
2,4-D	MR	4	2011
Simazine	MR	4	2011

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Mountain Coal Co LLC West Elk Mine.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID CO0226838 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Colorado Drinking Water Authority

Colorado Department of Public Health and Environment, Water Quality Control is the primacy agency that licenses and inspects Mountain Coal Co LLC West Elk Mine under EPA-delegated authority.

Open CO regulator portal

Source: Colorado Department of Public Health and Environment, Water Quality Control

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest)	Contaminant	Category	Count	EPA Record
2025	Lead and Copper Rule	MR	7	SDWIS / CO0226838 / 5000
2017	E. COLI	MR	3	SDWIS / CO0226838 / 3014
2011	Diquat	MR	8	SDWIS / CO0226838 / 2032
2011	OXAMYL	MR	8	SDWIS / CO0226838 / 2036
2011	Carbofuran	MR	8	SDWIS / CO0226838 / 2046
2011	Methoxychlor	MR	7	SDWIS / CO0226838 / 2015
2011	BHC-GAMMA	MR	4	SDWIS / CO0226838 / 2010
2011	Di(2-ethylhexyl) adipate	MR	4	SDWIS / CO0226838 / 2035
2011	Di(2-ethylhexyl) phthalate	MR	4	SDWIS / CO0226838 / 2039
2011	Picloram	MR	4	SDWIS / CO0226838 / 2040
2011	Dinoseb	MR	4	SDWIS / CO0226838 / 2041
2011	Aldicarb sulfone	MR	4	SDWIS / CO0226838 / 2044
2011	Aldicarb	MR	4	SDWIS / CO0226838 / 2047
2011	Atrazine	MR	4	SDWIS / CO0226838 / 2050
2011	LASSO	MR	4	SDWIS / CO0226838 / 2051

How Mountain Coal Co LLC West Elk Mine Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric	Mountain Coal Co LLC West Elk Mine	Colorado avg	Federal benchmark
Total violations	212	108.9	SDWA compliance, any non-zero count is a recorded breach
Health-based violations	0	13.9	Indicates a contaminant exceeded a federal MCL
PFAS detection	None	60.1%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	300	3,408	Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,193 regulated public water systems in Colorado.

Federal MCL reference, Safe Drinking Water Act thresholds ▼

Contaminant	Federal MCL / Action Level	Note
Lead	0 mg/L (Action Level: 0.015 mg/L)	Lead and Copper Rule treatment technique
Arsenic	0.010 mg/L (10 ppb)	Health-based MCL since 2006
Total Coliform	Treatment technique (RTCR)	Indicator organism, monitoring trigger
PFOA / PFOS (PFAS)	4.0 ppt each (final 2024 rule)	Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N)	10 mg/L	Acute health risk for infants

Frequently Asked Questions

Is Mountain Coal Co LLC West Elk Mine water safe to drink? ▼

Mountain Coal Co LLC West Elk Mine (PWS ID: CO0226838) has 212 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 300 people using Surface Water sources.

How many people does Mountain Coal Co LLC West Elk Mine serve? ▼

Mountain Coal Co LLC West Elk Mine serves 300 people in Somerset, Colorado. It is a Private-owned system using Surface Water water sources with 7 service connections.

What type of violations does Mountain Coal Co LLC West Elk Mine have? ▼

Mountain Coal Co LLC West Elk Mine has 212 total violations: 0 health-based violations (MCL exceedances or treatment failures), 212 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Mountain Coal Co LLC West Elk Mine water? ▼

No PFAS testing data is available for Mountain Coal Co LLC West Elk Mine under the EPA's UCMR5 monitoring program.

What water source does Mountain Coal Co LLC West Elk Mine use? ▼

Mountain Coal Co LLC West Elk Mine uses Surface Water as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.

Where does this data come from? ▼

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.