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Community Water System · PWS CO0134530

Lake Durango WA

Durango, Colorado 81302 - drinking water served from surface water sources to 1,577 people, tracked in EPA SDWIS and UCMR5.

1,577
People served
188
EPA violations
76
Health-based
Untested
UCMR5 result

The verdict

EPA records 188 drinking-water violations at Lake Durango WA, 40% of them health-based - above the Colorado per-system average.

188
Total EPA violations on record
40%
Health-based (MCL / treatment failure)
1,577
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lake Durango WA

Lake Durango WA is a private-owned community water system that delivers drinking water to 1,577 residents in Durango, Colorado (La Plata County) through 631 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 188 total violations for this system , of which 76 (40%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 110 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Chlorite, recorded in 30 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%).

Lake Durango WA's 188 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
1,577
Total Violations
188
Health-Based Violations
76
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
631
County
La Plata
School/Daycare
No
MCL Violations
24
Monitoring Violations
110
Treatment Tech Violations
52

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorite MR 30 2020
Interim Enhanced Surface Water Treatment Rule TT 26 2018
Surface Water Treatment Rule TT 22 2006
TTHM MCL 20 2018
Surface Water Treatment Rule MR 19 2014
TTHM MR 10 2019
Chlorine dioxide MR 9 2018
Di(2-ethylhexyl) phthalate MR 9 2022
Total Haloacetic Acids (HAA5) MR 7 2019
Lead and Copper Rule MR 6 2018
Chlorine MR 6 2014
Coliform (TCR) MR 6 2014
Total Haloacetic Acids (HAA5) MCL 4 2015
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 4 2022
Chromium MR 3 2004
E. COLI MR 3 2008
Public Notice Other 2 2022
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 2 2008

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 Lake Durango WA.

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 CO0134530 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 Lake Durango WA 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
2022 Di(2-ethylhexyl) phthalate MR 9 SDWIS / CO0134530 / 2039
2022 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 4 SDWIS / CO0134530 / 0400
2022 Public Notice Other 2 SDWIS / CO0134530 / 7500
2020 Chlorite MR 30 SDWIS / CO0134530 / 1009
2019 TTHM MR 10 SDWIS / CO0134530 / 2950
2019 Total Haloacetic Acids (HAA5) MR 7 SDWIS / CO0134530 / 2456
2018 Interim Enhanced Surface Water Treatment Rule TT 26 SDWIS / CO0134530 / 0300
2018 TTHM MCL 20 SDWIS / CO0134530 / 2950
2018 Chlorine dioxide MR 9 SDWIS / CO0134530 / 1008
2018 Lead and Copper Rule MR 6 SDWIS / CO0134530 / 5000
2015 Total Haloacetic Acids (HAA5) MCL 4 SDWIS / CO0134530 / 2456
2014 Surface Water Treatment Rule MR 19 SDWIS / CO0134530 / 0200
2014 Chlorine MR 6 SDWIS / CO0134530 / 0999
2014 Coliform (TCR) MR 6 SDWIS / CO0134530 / 3100
2008 E. COLI MR 3 SDWIS / CO0134530 / 3014

How Lake Durango WA Compares

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

Metric Lake Durango WA Colorado avg Federal benchmark
Total violations 188 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 76 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 1,577 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 Lake Durango WA water safe to drink? ▼
Lake Durango WA (PWS ID: CO0134530) has 188 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,577 people using Surface Water sources.
How many people does Lake Durango WA serve? ▼
Lake Durango WA serves 1,577 people in Durango, Colorado. It is a Private-owned system using Surface Water water sources with 631 service connections.
What type of violations does Lake Durango WA have? ▼
Lake Durango WA has 188 total violations: 76 health-based violations (MCL exceedances or treatment failures), 110 monitoring/reporting violations, and 52 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lake Durango WA water? ▼
No PFAS testing data is available for Lake Durango WA under the EPA's UCMR5 monitoring program.
What water source does Lake Durango WA use? ▼
Lake Durango WA 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.