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ROCK CREEK WATER DISTRICT

PWS ID: OR4100337 · GRAND RONDE, Oregon 97347

ROCK CREEK WATER DISTRICT serves 300 people in GRAND RONDE, Oregon using Surface Water water sources. It has 419 recorded EPA violations, including 17 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: ROCK CREEK WATER DISTRICT

ROCK CREEK WATER DISTRICT is a local-owned community water system that delivers drinking water to 300 residents in GRAND RONDE, Oregon (Polk County) through 108 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 419 total violations for this system , of which 17 (4%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 391 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 Surface Water Treatment Rule, recorded in 291 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 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. ROCK CREEK WATER DISTRICT's 419 violations sit above the Oregon average. Statewide, 30 of 125 UCMR5-tested systems have reported PFAS detections (24%). 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
300
Total Violations
419
Health-Based Violations
17
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
108
County
Polk
School/Daycare
No
MCL Violations
1
Monitoring Violations
391
Treatment Tech Violations
16

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 291 2025
Interim Enhanced Surface Water Treatment Rule MR 31 2025
Surface Water Treatment Rule TT 16 2025
Coliform (TCR) MR 12 2015
Nitrate MR 6 2009
Consumer Confidence Rule Other 5 2025
Public Notice Other 3 2025
1,2,4-Trichlorobenzene MR 2 2009
DICHLOROMETHANE MR 2 2009
p-Dichlorobenzene MR 2 2009
Vinyl chloride MR 2 2009
trans-1,2-Dichloroethylene MR 2 2009
1,2-Dichloroethane MR 2 2009
1,1,1-Trichloroethane MR 2 2009
Carbon tetrachloride MR 2 2009
1,2-Dichloropropane MR 2 2009
Trichloroethylene MR 2 2009
Benzene MR 2 2009
Toluene MR 2 2009
Xylenes, Total MR 2 2009
cis-1,2-Dichloroethylene MR 2 2009
o-Dichlorobenzene MR 2 2009
Styrene MR 2 2009
1,1-Dichloroethylene MR 2 2009
1,1,2-Trichloroethane MR 2 2009
Ethylbenzene MR 2 2009
Tetrachloroethylene MR 2 2009
CHLOROBENZENE MR 2 2009
DICHLOROMETHANE MCL 1 2007
Cadmium MR 1 1979

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 ROCK CREEK WATER DISTRICT.

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 OR4100337 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
2025 Surface Water Treatment Rule MR 291 SDWIS / OR4100337 / 0200
2025 Interim Enhanced Surface Water Treatment Rule MR 31 SDWIS / OR4100337 / 0300
2025 Surface Water Treatment Rule TT 16 SDWIS / OR4100337 / 0200
2025 Consumer Confidence Rule Other 5 SDWIS / OR4100337 / 7000
2025 Public Notice Other 3 SDWIS / OR4100337 / 7500
2015 Coliform (TCR) MR 12 SDWIS / OR4100337 / 3100
2009 Nitrate MR 6 SDWIS / OR4100337 / 1040
2009 1,2,4-Trichlorobenzene MR 2 SDWIS / OR4100337 / 2378
2009 DICHLOROMETHANE MR 2 SDWIS / OR4100337 / 2964
2009 p-Dichlorobenzene MR 2 SDWIS / OR4100337 / 2969
2009 Vinyl chloride MR 2 SDWIS / OR4100337 / 2976
2009 trans-1,2-Dichloroethylene MR 2 SDWIS / OR4100337 / 2979
2009 1,2-Dichloroethane MR 2 SDWIS / OR4100337 / 2980
2009 1,1,1-Trichloroethane MR 2 SDWIS / OR4100337 / 2981
2009 Carbon tetrachloride MR 2 SDWIS / OR4100337 / 2982

How ROCK CREEK WATER DISTRICT Compares

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

Metric ROCK CREEK WATER DISTRICT Oregon avg Federal benchmark
Total violations 419 82.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 17 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 300 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is ROCK CREEK WATER DISTRICT water safe to drink? ▼
ROCK CREEK WATER DISTRICT (PWS ID: OR4100337) has 419 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 300 people using Surface Water sources.
How many people does ROCK CREEK WATER DISTRICT serve? ▼
ROCK CREEK WATER DISTRICT serves 300 people in GRAND RONDE, Oregon. It is a Local-owned system using Surface Water water sources with 108 service connections.
What type of violations does ROCK CREEK WATER DISTRICT have? ▼
ROCK CREEK WATER DISTRICT has 419 total violations: 17 health-based violations (MCL exceedances or treatment failures), 391 monitoring/reporting violations, and 16 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in ROCK CREEK WATER DISTRICT water? ▼
No PFAS testing data is available for ROCK CREEK WATER DISTRICT under the EPA's UCMR5 monitoring program.
What water source does ROCK CREEK WATER DISTRICT use? ▼
ROCK CREEK WATER DISTRICT uses Surface Water 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.

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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.

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