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Non-Transient Non-Community Water System · PWS OR4193718

Ninety-One Elem SD 91

Canby, Oregon 97013 - drinking water served from groundwater sources to 450 people, tracked in EPA SDWIS and UCMR5.

450
People served
220
EPA violations
37
Health-based
Untested
UCMR5 result

The verdict

EPA records 220 drinking-water violations at Ninety-One Elem SD 91, 17% of them health-based - above the Oregon per-system average.

220
Total EPA violations on record
17%
Health-based (MCL / treatment failure)
450
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Ninety-One Elem SD 91

Ninety-One Elem SD 91 is a local-owned non-transient non-community water system that delivers drinking water to 450 residents in Canby, Oregon (Clackamas County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 220 total violations for this system , of which 37 (17%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 157 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Arsenic, recorded in 33 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Oregon, EPA tracks 2,518 public water systems serving 4,005,242 people, with 206,659 cumulative violations and 20,339 health-based violations on record. About 99% of systems in the state carry at least one violation, and state-wide the average per system is 82.1 violations. Statewide, 30 of 125 UCMR5-tested systems have reported PFAS detections (24%).

Ninety-One Elem SD 91's 220 violations sit above the Oregon 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
450
Total Violations
220
Health-Based Violations
37
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
1
County
Clackamas
School/Daycare
Yes
MCL Violations
37
Monitoring Violations
157
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 33 2012
Public Notice Other 23 2012
Arsenic MR 17 2014
Coliform (TCR) MR 6 2009
Endothall MR 4 1999
Coliform (TCR) MCL 4 1995
Nitrate MR 3 2007
Lead and Copper Rule MR 3 2023
1,2-DIBROMO-3-CHLOROPROPANE MR 2 1996
Dinoseb MR 2 1996
Diquat MR 2 1996
ETHYLENE DIBROMIDE MR 2 1996
Heptachlor epoxide MR 2 1996
Heptachlor MR 2 1996
Pentachlorophenol MR 2 1996
Simazine MR 2 1996
Total Polychlorinated Biphenyls (PCB) MR 2 1996
Toxaphene MR 2 1996
OXAMYL MR 2 1996
1,1-Dichloroethylene MR 2 1996
1,1,1-Trichloroethane MR 2 1996
1,1,2-Trichloroethane MR 2 1996
1,2,4-Trichlorobenzene MR 2 1996
DICHLOROMETHANE MR 2 1996
CHLOROBENZENE MR 2 1996
Tetrachloroethylene MR 2 1996
trans-1,2-Dichloroethylene MR 2 1996
Vinyl chloride MR 2 1996
Xylenes, Total MR 2 1996
Barium MR 2 1996

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 Ninety-One Elem SD 91.

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 OR4193718 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Oregon Drinking Water Authority

Oregon'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 OR 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
2023 Lead and Copper Rule MR 3 SDWIS / OR4193718 / 5000
2016 Revised Total Coliform Rule MON 2 SDWIS / OR4193718 / 8000
2014 Arsenic MR 17 SDWIS / OR4193718 / 1005
2012 Arsenic MCL 33 SDWIS / OR4193718 / 1005
2012 Public Notice Other 23 SDWIS / OR4193718 / 7500
2009 Coliform (TCR) MR 6 SDWIS / OR4193718 / 3100
2007 Nitrate MR 3 SDWIS / OR4193718 / 1040
1999 Endothall MR 4 SDWIS / OR4193718 / 2033
1996 1,2-DIBROMO-3-CHLOROPROPANE MR 2 SDWIS / OR4193718 / 2931
1996 Dinoseb MR 2 SDWIS / OR4193718 / 2041
1996 Diquat MR 2 SDWIS / OR4193718 / 2032
1996 ETHYLENE DIBROMIDE MR 2 SDWIS / OR4193718 / 2946
1996 Heptachlor epoxide MR 2 SDWIS / OR4193718 / 2067
1996 Heptachlor MR 2 SDWIS / OR4193718 / 2065
1996 Pentachlorophenol MR 2 SDWIS / OR4193718 / 2326

How Ninety-One Elem SD 91 Compares

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

Metric Ninety-One Elem SD 91 Oregon avg Federal benchmark
Total violations 220 82.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 37 8.1 Indicates a contaminant exceeded a federal MCL
PFAS detection None 24% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 450 1,591 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,518 regulated public water systems in Oregon.

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 Ninety-One Elem SD 91 water safe to drink? ▼
Ninety-One Elem SD 91 (PWS ID: OR4193718) has 220 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 450 people using Groundwater sources.
How many people does Ninety-One Elem SD 91 serve? ▼
Ninety-One Elem SD 91 serves 450 people in Canby, Oregon. It is a Local-owned system using Groundwater water sources with 1 service connections.
What type of violations does Ninety-One Elem SD 91 have? ▼
Ninety-One Elem SD 91 has 220 total violations: 37 health-based violations (MCL exceedances or treatment failures), 157 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Ninety-One Elem SD 91 water? ▼
No PFAS testing data is available for Ninety-One Elem SD 91 under the EPA's UCMR5 monitoring program.
What water source does Ninety-One Elem SD 91 use? ▼
Ninety-One Elem SD 91 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.