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Community Water System · PWS ID1050009

Emida Water and Sewer Association

St Maries, Idaho 83861 - drinking water served from groundwater sources to 95 people, tracked in EPA SDWIS and UCMR5.

95
People served
78
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 78 drinking-water violations at Emida Water and Sewer Association, 5% of them health-based - above the Idaho per-system average.

78
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
95
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Emida Water and Sewer Association

Emida Water and Sewer Association is a local-owned community water system that delivers drinking water to 95 residents in St Maries, Idaho (Benewah County) through 47 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 78 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 67 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 19 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 Idaho, EPA tracks 2,005 public water systems serving 1,743,912 people, with 104,850 cumulative violations and 19,965 health-based violations on record. About 96% of systems in the state carry at least one violation, and state-wide the average per system is 52.3 violations. Statewide, 40 of 60 UCMR5-tested systems have reported PFAS detections (66.7%).

Emida Water and Sewer Association's 78 violations sit above the Idaho 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
95
Total Violations
78
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
47
County
Benewah
School/Daycare
No
MCL Violations
4
Monitoring Violations
67
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 19 2012
Nitrate MR 5 2008
E. COLI MR 4 2014
Coliform (TCR) MCL 4 2015
Lead and Copper Rule MR 4 2020
Carbofuran MR 2 2008
Consumer Confidence Rule Other 2 1999
Public Notice Other 2 2021
LASSO MR 1 1993
Atrazine MR 1 1993
Heptachlor epoxide MR 1 1993
BHC-GAMMA MR 1 1993
2,4-D MR 1 1993
1,1-Dichloroethylene MR 1 1993
1,2-Dichloroethane MR 1 1993
1,2-Dichloropropane MR 1 1993
o-Dichlorobenzene MR 1 1993
p-Dichlorobenzene MR 1 1993
Styrene MR 1 1993
1,1,1-Trichloroethane MR 1 1993
Toluene MR 1 1993
1,2-DIBROMO-3-CHLOROPROPANE MR 1 1993
Pentachlorophenol MR 1 1993
Ethylbenzene MR 1 1993
Toxaphene MR 1 1993
cis-1,2-Dichloroethylene MR 1 1993
Carbon tetrachloride MR 1 1993
Gross Alpha, Excl. Radon and U MR 1 1979
trans-1,2-Dichloroethylene MR 1 1993
Tetrachloroethylene MR 1 1993

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 Emida Water and Sewer Association.

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 ID1050009 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Idaho Drinking Water Authority

Idaho'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 ID 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
2021 Public Notice Other 2 SDWIS / ID1050009 / 7500
2020 Lead and Copper Rule MR 4 SDWIS / ID1050009 / 5000
2015 Coliform (TCR) MCL 4 SDWIS / ID1050009 / 3100
2014 E. COLI MR 4 SDWIS / ID1050009 / 3014
2012 Coliform (TCR) MR 19 SDWIS / ID1050009 / 3100
2008 Nitrate MR 5 SDWIS / ID1050009 / 1040
2008 Carbofuran MR 2 SDWIS / ID1050009 / 2046
1999 Consumer Confidence Rule Other 2 SDWIS / ID1050009 / 7000
1996 Di(2-ethylhexyl) phthalate MR 1 SDWIS / ID1050009 / 2039
1993 LASSO MR 1 SDWIS / ID1050009 / 2051
1993 Atrazine MR 1 SDWIS / ID1050009 / 2050
1993 Heptachlor epoxide MR 1 SDWIS / ID1050009 / 2067
1993 BHC-GAMMA MR 1 SDWIS / ID1050009 / 2010
1993 2,4-D MR 1 SDWIS / ID1050009 / 2105
1993 1,1-Dichloroethylene MR 1 SDWIS / ID1050009 / 2977

How Emida Water and Sewer Association Compares

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

Metric Emida Water and Sewer Association Idaho avg Federal benchmark
Total violations 78 52.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 10 Indicates a contaminant exceeded a federal MCL
PFAS detection None 66.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 95 870 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,005 regulated public water systems in Idaho.

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 Emida Water and Sewer Association water safe to drink? ▼
Emida Water and Sewer Association (PWS ID: ID1050009) has 78 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 95 people using Groundwater sources.
How many people does Emida Water and Sewer Association serve? ▼
Emida Water and Sewer Association serves 95 people in St Maries, Idaho. It is a Local-owned system using Groundwater water sources with 47 service connections.
What type of violations does Emida Water and Sewer Association have? ▼
Emida Water and Sewer Association has 78 total violations: 4 health-based violations (MCL exceedances or treatment failures), 67 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Emida Water and Sewer Association water? ▼
No PFAS testing data is available for Emida Water and Sewer Association under the EPA's UCMR5 monitoring program.
What water source does Emida Water and Sewer Association use? ▼
Emida Water and Sewer Association 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.