PlainWater
States → Wyoming

Community Water System · PWS WY5600285

Ridgewater Improvement District

Douglas, Wyoming 82633 - drinking water served from surface water sources to 218 people, tracked in EPA SDWIS and UCMR5.

218
People served
35
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 35 drinking-water violations at Ridgewater Improvement District - below the Wyoming per-system average.

35
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
218
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Ridgewater Improvement District

Ridgewater Improvement District is a public/private-owned community water system that delivers drinking water to 218 residents in Douglas, Wyoming (Converse County) through 94 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 35 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 22 monitoring and reporting violations are on file. The most recent violation on record dates to 2015.

The most frequently cited contaminant at this system is Coliform (TCR), 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 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. Statewide, 18 of 33 UCMR5-tested systems have reported PFAS detections (54.5%).

Ridgewater Improvement District's 35 violations sit below the Wyoming 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
218
Total Violations
35
Health-Based Violations
0
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Public/Private
Connections
94
County
Converse
School/Daycare
No
MCL Violations
0
Monitoring Violations
22
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 8 2011
Consumer Confidence Rule Other 6 2015
Lead and Copper Rule MR 4 2000
Gross Alpha, Excl. Radon and U MR 3 1982
Total Haloacetic Acids (HAA5) MR 2 2015
TTHM MR 2 2015
Chlorine MR 1 2010
Nitrate MR 1 1993
Combined Radium (-226 and -228) MR 1 1976

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 Ridgewater Improvement District.

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 WY5600285 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

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 SDWIS

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
2015 Consumer Confidence Rule Other 6 SDWIS / WY5600285 / 7000
2015 Total Haloacetic Acids (HAA5) MR 2 SDWIS / WY5600285 / 2456
2015 TTHM MR 2 SDWIS / WY5600285 / 2950
2011 Coliform (TCR) MR 8 SDWIS / WY5600285 / 3100
2010 Chlorine MR 1 SDWIS / WY5600285 / 0999
2000 Lead and Copper Rule MR 4 SDWIS / WY5600285 / 5000
1993 Nitrate MR 1 SDWIS / WY5600285 / 1040
1982 Gross Alpha, Excl. Radon and U MR 3 SDWIS / WY5600285 / 4000
1976 Combined Radium (-226 and -228) MR 1 SDWIS / WY5600285 / 4010

How Ridgewater Improvement District Compares

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

Metric Ridgewater Improvement District Wyoming avg Federal benchmark
Total violations 35 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 218 835 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 (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 Ridgewater Improvement District water safe to drink? ▼
Ridgewater Improvement District (PWS ID: WY5600285) has 35 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 218 people using Surface Water sources.
How many people does Ridgewater Improvement District serve? ▼
Ridgewater Improvement District serves 218 people in Douglas, Wyoming. It is a Public/Private-owned system using Surface Water water sources with 94 service connections.
What type of violations does Ridgewater Improvement District have? ▼
Ridgewater Improvement District has 35 total violations: 0 health-based violations (MCL exceedances or treatment failures), 22 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Ridgewater Improvement District water? ▼
No PFAS testing data is available for Ridgewater Improvement District under the EPA's UCMR5 monitoring program.
What water source does Ridgewater Improvement District use? ▼
Ridgewater Improvement District uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
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.