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Community Water System · PWS CO0161010

Otis Town Of

Otis, Colorado 80743 - drinking water served from groundwater sources to 600 people, tracked in EPA SDWIS and UCMR5.

600
People served
1,054
EPA violations
7
Health-based
Untested
UCMR5 result

The verdict

EPA records 1,054 drinking-water violations at Otis Town Of, 1% of them health-based - above the Colorado per-system average.

1,054
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
600
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Otis Town Of

Otis Town Of is a local-owned community water system that delivers drinking water to 600 residents in Otis, Colorado (Washington County) through 260 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 1,054 total violations for this system , of which 7 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 1,003 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 Combined Radium (-226 and -228), recorded in 64 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%).

Otis Town Of's 1,054 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
600
Total Violations
1,054
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
260
County
Washington
School/Daycare
No
MCL Violations
3
Monitoring Violations
1,003
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MR 64 2008
Nitrate MR 25 2007
Chlorine MR 23 2013
Lead and Copper Rule MR 21 2025
BHC-GAMMA MR 20 2005
Consumer Confidence Rule Other 19 2022
Public Notice Other 17 2023
Endrin MR 16 2005
Diquat MR 16 2005
Endothall MR 16 2005
Simazine MR 16 2005
Di(2-ethylhexyl) phthalate MR 16 2005
Dinoseb MR 16 2005
Hexachlorocyclopentadiene MR 16 2005
Aldicarb sulfoxide MR 16 2005
Aldicarb MR 16 2005
LASSO MR 16 2005
Heptachlor epoxide MR 16 2005
2,4-D MR 16 2005
Pentachlorophenol MR 16 2005
ETHYLENE DIBROMIDE MR 16 2005
Chlordane MR 16 2005
Methoxychlor MR 16 2005
Toxaphene MR 16 2005
Di(2-ethylhexyl) adipate MR 16 2005
Carbofuran MR 16 2005
Atrazine MR 16 2005
2,4,5-TP MR 16 2005
Benzo(a)pyrene MR 16 2005
Total Polychlorinated Biphenyls (PCB) MR 16 2005

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 Otis Town Of.

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 CO0161010 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 Otis Town Of 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 21 SDWIS / CO0161010 / 5000
2025 LEAD AND COPPER RULE REVISIONS RPT 3 SDWIS / CO0161010 / 5200
2023 Public Notice Other 17 SDWIS / CO0161010 / 7500
2022 Consumer Confidence Rule Other 19 SDWIS / CO0161010 / 7000
2022 Groundwater Rule TT 4 SDWIS / CO0161010 / 0700
2013 Chlorine MR 23 SDWIS / CO0161010 / 0999
2013 Coliform (TCR) MR 10 SDWIS / CO0161010 / 3100
2008 Combined Radium (-226 and -228) MR 64 SDWIS / CO0161010 / 4010
2008 Stage 2 Disinfectants and Disinfection Byproducts Rule MR 2 SDWIS / CO0161010 / 0600
2007 Nitrate MR 25 SDWIS / CO0161010 / 1040
2006 Total Haloacetic Acids (HAA5) MR 3 SDWIS / CO0161010 / 2456
2006 TTHM MR 3 SDWIS / CO0161010 / 2950
2005 BHC-GAMMA MR 20 SDWIS / CO0161010 / 2010
2005 Endrin MR 16 SDWIS / CO0161010 / 2005
2005 Diquat MR 16 SDWIS / CO0161010 / 2032

How Otis Town Of Compares

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

Metric Otis Town Of Colorado avg Federal benchmark
Total violations 1,054 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 7 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 600 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 Otis Town Of water safe to drink? ▼
Otis Town Of (PWS ID: CO0161010) has 1054 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 600 people using Groundwater sources.
How many people does Otis Town Of serve? ▼
Otis Town Of serves 600 people in Otis, Colorado. It is a Local-owned system using Groundwater water sources with 260 service connections.
What type of violations does Otis Town Of have? ▼
Otis Town Of has 1,054 total violations: 7 health-based violations (MCL exceedances or treatment failures), 1,003 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Otis Town Of water? ▼
No PFAS testing data is available for Otis Town Of under the EPA's UCMR5 monitoring program.
What water source does Otis Town Of use? ▼
Otis Town Of uses Groundwater 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.