HWY 390 LLC
PWS ID: WY5601725 · WILSON, Wyoming 83014
HWY 390 LLC serves 50 people in WILSON, Wyoming using Groundwater water sources. It has 56 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.
Water Quality Snapshot: HWY 390 LLC
HWY 390 LLC is a private-owned community water system that delivers drinking water to 50 residents in WILSON, Wyoming (Teton County) through 14 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 56 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 55 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.
The most frequently cited contaminant at this system is Vinyl chloride, recorded in 1 violation (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.
Across Wyoming, EPA tracks 766 public water systems serving 639,288 people, with 32,465 cumulative violations and 4,023 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 42.4 violations. HWY 390 LLC's 56 violations sit above the Wyoming average. Statewide, 18 of 33 UCMR5-tested systems have reported PFAS detections (54.5%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 14
- County
- Teton
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 55
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Vinyl chloride | MR | 1 | 2021 |
| 1,2-Dichloroethane | MR | 1 | 2021 |
| 1,1,1-Trichloroethane | MR | 1 | 2021 |
| Trichloroethylene | MR | 1 | 2021 |
| 1,1,2-Trichloroethane | MR | 1 | 2021 |
| Toluene | MR | 1 | 2021 |
| Ethylbenzene | MR | 1 | 2021 |
| Styrene | MR | 1 | 2021 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 2021 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 2021 |
| Dinoseb | MR | 1 | 2021 |
| Simazine | MR | 1 | 2021 |
| Pentachlorophenol | MR | 1 | 2021 |
| 2,4-D | MR | 1 | 2021 |
| 2,4,5-TP | MR | 1 | 2021 |
| Atrazine | MR | 1 | 2021 |
| Hexachlorocyclopentadiene | MR | 1 | 2021 |
| HEXACHLOROBENZENE | MR | 1 | 2021 |
| OXAMYL | MR | 1 | 2021 |
| Dalapon | MR | 1 | 2021 |
| Combined Radium (-226 and -228) | MR | 1 | 2021 |
| Endrin | MR | 1 | 2021 |
| Radium-226 | MR | 1 | 2021 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2021 |
| cis-1,2-Dichloroethylene | MR | 1 | 2021 |
| Xylenes, Total | MR | 1 | 2021 |
| o-Dichlorobenzene | MR | 1 | 2021 |
| trans-1,2-Dichloroethylene | MR | 1 | 2021 |
| Picloram | MR | 1 | 2021 |
| Methoxychlor | MR | 1 | 2021 |
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 HWY 390 LLC.
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 WY5601725 on SDWISSource: EPA SDWIS Federal Reports Search
Wyoming Drinking Water Authority
Wyoming's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.
Find WY regulator via EPA SDWISViolation 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 |
|---|---|---|---|---|
| 2021 | Vinyl chloride | MR | 1 | SDWIS / WY5601725 / 2976 |
| 2021 | 1,2-Dichloroethane | MR | 1 | SDWIS / WY5601725 / 2980 |
| 2021 | 1,1,1-Trichloroethane | MR | 1 | SDWIS / WY5601725 / 2981 |
| 2021 | Trichloroethylene | MR | 1 | SDWIS / WY5601725 / 2984 |
| 2021 | 1,1,2-Trichloroethane | MR | 1 | SDWIS / WY5601725 / 2985 |
| 2021 | Toluene | MR | 1 | SDWIS / WY5601725 / 2991 |
| 2021 | Ethylbenzene | MR | 1 | SDWIS / WY5601725 / 2992 |
| 2021 | Styrene | MR | 1 | SDWIS / WY5601725 / 2996 |
| 2021 | Gross Alpha, Excl. Radon and U | MR | 1 | SDWIS / WY5601725 / 4000 |
| 2021 | 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | SDWIS / WY5601725 / 2931 |
| 2021 | Dinoseb | MR | 1 | SDWIS / WY5601725 / 2041 |
| 2021 | Simazine | MR | 1 | SDWIS / WY5601725 / 2037 |
| 2021 | Pentachlorophenol | MR | 1 | SDWIS / WY5601725 / 2326 |
| 2021 | 2,4-D | MR | 1 | SDWIS / WY5601725 / 2105 |
| 2021 | 2,4,5-TP | MR | 1 | SDWIS / WY5601725 / 2110 |
How HWY 390 LLC Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | HWY 390 LLC | Wyoming avg | Federal benchmark |
|---|---|---|---|
| Total violations | 56 | 42.4 | SDWA compliance — any non-zero count is a recorded breach |
| Health-based violations | 0 | 5.3 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 54.5% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 50 | 835 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 766 regulated public water systems in Wyoming.
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 |
| Nitrate (as N) | 10 mg/L | Acute health risk for infants |
Frequently Asked Questions
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Related Data for Wyoming
Read our methodology — how this data is sourced, computed, and verified.