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States → EPA Region 8 — Tribal Water Systems

Transient Non-Community Water System · PWS 085690010

St. Stephens Indian Mission, Inc.

St. Stephens, EPA Region 8 — Tribal Water Systems 82524 - drinking water served from groundwater sources to 62 people, tracked in EPA SDWIS and UCMR5.

62
People served
117
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 117 drinking-water violations at St. Stephens Indian Mission, Inc., 2% of them health-based.

117
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
62
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: St. Stephens Indian Mission, Inc.

St. Stephens Indian Mission, Inc. is a private-owned transient non-community water system that delivers drinking water to 62 residents in St. Stephens, EPA Region 8 — Tribal Water Systems through 10 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 117 total violations for this system , of which 2 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 112 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 Coliform (TCR), recorded in 15 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 8 — Tribal Water Systems has thousands of regulated public water systems tracked by EPA under the Safe Drinking Water Act.

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
62
Total Violations
117
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
10
School/Daycare
Yes
MCL Violations
2
Monitoring Violations
112
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 15 2013
Revised Total Coliform Rule MON 11 2024
Gross Alpha, Excl. Radon and U MR 7 2013
Radium-226 MR 7 2013
Radium-228 MR 7 2013
Combined Uranium MR 7 2013
Nitrate-Nitrite MR 5 2024
CYANIDE MR 2 2011
Coliform (TCR) MCL 2 2012
Endrin MR 1 2011
BHC-GAMMA MR 1 2011
Diquat MR 1 2011
Di(2-ethylhexyl) adipate MR 1 2011
Di(2-ethylhexyl) phthalate MR 1 2011
Picloram MR 1 2011
LASSO MR 1 2011
Atrazine MR 1 2011
Benzo(a)pyrene MR 1 2011
1,2-DIBROMO-3-CHLOROPROPANE MR 1 2011
ETHYLENE DIBROMIDE MR 1 2011
Chlordane MR 1 2011
Xylenes, Total MR 1 2011
o-Dichlorobenzene MR 1 2011
1,1-Dichloroethylene MR 1 2011
trans-1,2-Dichloroethylene MR 1 2011
1,2-Dichloroethane MR 1 2011
1,1,1-Trichloroethane MR 1 2011
Carbon tetrachloride MR 1 2011
Trichloroethylene MR 1 2011
Tetrachloroethylene MR 1 2011

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 St. Stephens Indian Mission, Inc..

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 085690010 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 8 — Tribal Water Systems Drinking Water Authority

EPA Region 8 — Tribal Water Systems'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 08 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
2024 Revised Total Coliform Rule MON 11 SDWIS / 085690010 / 8000
2024 Nitrate-Nitrite MR 5 SDWIS / 085690010 / 1038
2013 Coliform (TCR) MR 15 SDWIS / 085690010 / 3100
2013 Gross Alpha, Excl. Radon and U MR 7 SDWIS / 085690010 / 4000
2013 Radium-226 MR 7 SDWIS / 085690010 / 4020
2013 Radium-228 MR 7 SDWIS / 085690010 / 4030
2013 Combined Uranium MR 7 SDWIS / 085690010 / 4006
2013 Consumer Confidence Rule Other 1 SDWIS / 085690010 / 7000
2012 Coliform (TCR) MCL 2 SDWIS / 085690010 / 3100
2011 CYANIDE MR 2 SDWIS / 085690010 / 1024
2011 Endrin MR 1 SDWIS / 085690010 / 2005
2011 BHC-GAMMA MR 1 SDWIS / 085690010 / 2010
2011 Diquat MR 1 SDWIS / 085690010 / 2032
2011 Di(2-ethylhexyl) adipate MR 1 SDWIS / 085690010 / 2035
2011 Di(2-ethylhexyl) phthalate MR 1 SDWIS / 085690010 / 2039

How St. Stephens Indian Mission, Inc. Compares

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

Metric St. Stephens Indian Mission, Inc. EPA Region 8 — Tribal Water Systems avg Federal benchmark
Total violations 117 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 62 - Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across all regulated public water systems in EPA Region 8 — Tribal Water Systems.

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 St. Stephens Indian Mission, Inc. water safe to drink? ▼
St. Stephens Indian Mission, Inc. (PWS ID: 085690010) has 117 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 62 people using Groundwater sources.
How many people does St. Stephens Indian Mission, Inc. serve? ▼
St. Stephens Indian Mission, Inc. serves 62 people in St. Stephens, EPA Region 8 — Tribal Water Systems. It is a Private-owned system using Groundwater water sources with 10 service connections.
What type of violations does St. Stephens Indian Mission, Inc. have? ▼
St. Stephens Indian Mission, Inc. has 117 total violations: 2 health-based violations (MCL exceedances or treatment failures), 112 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in St. Stephens Indian Mission, Inc. water? ▼
No PFAS testing data is available for St. Stephens Indian Mission, Inc. under the EPA's UCMR5 monitoring program.
What water source does St. Stephens Indian Mission, Inc. use? ▼
St. Stephens Indian Mission, Inc. uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.