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Community Water System · PWS CO0121075

Calhan Town Of

Calhan, Colorado 80808 - drinking water served from groundwater sources to 780 people, tracked in EPA SDWIS and UCMR5.

780
People served
74
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 74 drinking-water violations at Calhan Town Of, 5% of them health-based - below the Colorado per-system average.

74
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
780
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Calhan Town Of

Calhan Town Of is a local-owned community water system that delivers drinking water to 780 residents in Calhan, Colorado (El Paso County) through 397 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 74 total violations for this system , of which 4 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 49 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 Lead and Copper Rule, recorded in 7 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%).

Calhan Town Of's 74 violations sit below 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
780
Total Violations
74
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
397
County
El Paso
School/Daycare
No
MCL Violations
0
Monitoring Violations
49
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 7 2025
Di(2-ethylhexyl) phthalate MR 6 2023
Dalapon MR 4 2011
Revised Total Coliform Rule Other 4 2018
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 4 2021
Public Notice Other 4 2022
2,4-D MR 4 2011
Pentachlorophenol MR 4 2011
Atrazine MR 3 2011
Simazine MR 3 2011
LEAD AND COPPER RULE REVISIONS RPT 3 2025
Benzo(a)pyrene MR 3 2011
Total Haloacetic Acids (HAA5) MR 3 2023
Endothall MR 3 2008
Di(2-ethylhexyl) adipate MR 3 2011
LASSO MR 3 2011
TTHM MR 3 2023
Consumer Confidence Rule Other 2 2004

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 Calhan 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 CO0121075 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 Calhan 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 7 SDWIS / CO0121075 / 5000
2025 LEAD AND COPPER RULE REVISIONS RPT 3 SDWIS / CO0121075 / 5200
2023 Di(2-ethylhexyl) phthalate MR 6 SDWIS / CO0121075 / 2039
2023 Total Haloacetic Acids (HAA5) MR 3 SDWIS / CO0121075 / 2456
2023 TTHM MR 3 SDWIS / CO0121075 / 2950
2022 Public Notice Other 4 SDWIS / CO0121075 / 7500
2021 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 4 SDWIS / CO0121075 / 0400
2018 Revised Total Coliform Rule Other 4 SDWIS / CO0121075 / 8000
2011 Dalapon MR 4 SDWIS / CO0121075 / 2031
2011 2,4-D MR 4 SDWIS / CO0121075 / 2105
2011 Pentachlorophenol MR 4 SDWIS / CO0121075 / 2326
2011 Atrazine MR 3 SDWIS / CO0121075 / 2050
2011 Simazine MR 3 SDWIS / CO0121075 / 2037
2011 Benzo(a)pyrene MR 3 SDWIS / CO0121075 / 2306
2011 Di(2-ethylhexyl) adipate MR 3 SDWIS / CO0121075 / 2035

How Calhan Town Of Compares

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

Metric Calhan Town Of Colorado avg Federal benchmark
Total violations 74 108.9 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 780 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 Calhan Town Of water safe to drink? ▼
Calhan Town Of (PWS ID: CO0121075) has 74 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 780 people using Groundwater sources.
How many people does Calhan Town Of serve? ▼
Calhan Town Of serves 780 people in Calhan, Colorado. It is a Local-owned system using Groundwater water sources with 397 service connections.
What type of violations does Calhan Town Of have? ▼
Calhan Town Of has 74 total violations: 4 health-based violations (MCL exceedances or treatment failures), 49 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Calhan Town Of water? ▼
No PFAS testing data is available for Calhan Town Of under the EPA's UCMR5 monitoring program.
What water source does Calhan Town Of use? ▼
Calhan 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.