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Non-Transient Non-Community Water System · PWS CO0156300

Grizzly Peak Water Sales

Durango, Colorado 81301 - drinking water served from groundwater sources to 503 people, tracked in EPA SDWIS and UCMR5.

503
People served
197
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 197 drinking-water violations at Grizzly Peak Water Sales, 2% of them health-based - above the Colorado per-system average.

197
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
503
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Grizzly Peak Water Sales

Grizzly Peak Water Sales is a private-owned non-transient non-community water system that delivers drinking water to 503 residents in Durango, Colorado (San Juan County) through 12 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 197 total violations for this system , of which 4 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 181 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Arsenic, recorded in 17 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%).

Grizzly Peak Water Sales's 197 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
503
Total Violations
197
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
12
County
San Juan
School/Daycare
No
MCL Violations
0
Monitoring Violations
181
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MR 17 2024
Nitrate MR 11 2024
Barium MR 6 2002
Chromium MR 6 2002
Mercury MR 6 2002
Antimony, Total MR 6 2002
Beryllium, Total MR 6 2002
Thallium, Total MR 6 2002
Lead and Copper Rule MR 6 2016
Cadmium MR 6 2002
Nickel MR 6 2002
Selenium MR 6 2002
1,2,4-Trichlorobenzene MR 4 2002
Xylenes, Total MR 4 2002
DICHLOROMETHANE MR 4 2002
o-Dichlorobenzene MR 4 2002
1,1-Dichloroethylene MR 4 2002
trans-1,2-Dichloroethylene MR 4 2002
1,2-Dichloroethane MR 4 2002
Carbon tetrachloride MR 4 2002
Trichloroethylene MR 4 2002
1,1,2-Trichloroethane MR 4 2002
Tetrachloroethylene MR 4 2002
CHLOROBENZENE MR 4 2002
Vinyl chloride MR 4 2002
Benzene MR 4 2002
p-Dichlorobenzene MR 4 2002
1,1,1-Trichloroethane MR 4 2002
1,2-Dichloropropane MR 4 2002
Toluene MR 4 2002

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 Grizzly Peak Water Sales.

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 CO0156300 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 Grizzly Peak Water Sales 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
2024 Arsenic MR 17 SDWIS / CO0156300 / 1005
2024 Nitrate MR 11 SDWIS / CO0156300 / 1040
2024 LEAD AND COPPER RULE REVISIONS TT 4 SDWIS / CO0156300 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 3 SDWIS / CO0156300 / 5200
2024 Public Notice Other 3 SDWIS / CO0156300 / 7500
2016 Lead and Copper Rule MR 6 SDWIS / CO0156300 / 5000
2014 Coliform (TCR) MR 3 SDWIS / CO0156300 / 3100
2014 Chlorine MR 3 SDWIS / CO0156300 / 0999
2002 Barium MR 6 SDWIS / CO0156300 / 1010
2002 Chromium MR 6 SDWIS / CO0156300 / 1020
2002 Mercury MR 6 SDWIS / CO0156300 / 1035
2002 Antimony, Total MR 6 SDWIS / CO0156300 / 1074
2002 Beryllium, Total MR 6 SDWIS / CO0156300 / 1075
2002 Thallium, Total MR 6 SDWIS / CO0156300 / 1085
2002 Cadmium MR 6 SDWIS / CO0156300 / 1015

How Grizzly Peak Water Sales Compares

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

Metric Grizzly Peak Water Sales Colorado avg Federal benchmark
Total violations 197 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 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 503 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 Grizzly Peak Water Sales water safe to drink? ▼
Grizzly Peak Water Sales (PWS ID: CO0156300) has 197 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 503 people using Groundwater sources.
How many people does Grizzly Peak Water Sales serve? ▼
Grizzly Peak Water Sales serves 503 people in Durango, Colorado. It is a Private-owned system using Groundwater water sources with 12 service connections.
What type of violations does Grizzly Peak Water Sales have? ▼
Grizzly Peak Water Sales has 197 total violations: 4 health-based violations (MCL exceedances or treatment failures), 181 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Grizzly Peak Water Sales water? ▼
No PFAS testing data is available for Grizzly Peak Water Sales under the EPA's UCMR5 monitoring program.
What water source does Grizzly Peak Water Sales use? ▼
Grizzly Peak Water Sales uses Groundwater 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.