States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 090605073

Round Valley Agency

Covelo, EPA Region 9 — Tribal Water Systems 95428 - drinking water served from groundwater sources to 84 people, tracked in EPA SDWIS and UCMR5.

Compiled by PlainWater Editorial, Drinking Water Quality Editorial Team · May 15, 2026

84
People served: 318
EPA violations: 5
Health-based: Untested
UCMR5 result

The verdict

EPA records 318 drinking-water violations at Round Valley Agency, 2% of them health-based.

318
Total EPA violations on record: 2%
Health-based (MCL / treatment failure): 84
People served by this system: N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Round Valley Agency

Round Valley Agency is a native american-owned community water system that delivers drinking water to 84 residents in Covelo, EPA Region 9 — Tribal Water Systems through 30 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 318 total violations for this system , of which 5 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 183 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 20 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 9 — 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

Total Violations

318

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Community
Owner Type: Native American
Connections: 30
School/Daycare: No
MCL Violations: 4
Monitoring Violations: 183
Treatment Tech Violations: 1

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Coliform (TCR)	MR	20	2015
Revised Total Coliform Rule	RPT	16	2024
Gross Alpha, Excl. Radon and U	MR	14	2011
Combined Uranium	MR	14	2011
Combined Radium (-226 and -228)	MR	14	2011
Nitrate	MR	11	2023
Lead and Copper Rule	MR	10	2020
Consumer Confidence Rule	Other	7	2010
Coliform (TCR)	MCL	4	2005
Chlorine	MR	4	2022
Revised Total Coliform Rule	MON	3	2022
Arsenic	MR	2	2008
Barium	MR	2	2008
Cadmium	MR	2	2008
Fluoride	MR	2	2011
Mercury	MR	2	2008
Selenium	MR	2	2008
Beryllium, Total	MR	2	2008
BHC-GAMMA	MR	2	2001
Toxaphene	MR	2	2001
Carbofuran	MR	2	2001
Atrazine	MR	2	2001
LASSO	MR	2	2001
Heptachlor	MR	2	2001
Heptachlor epoxide	MR	2	2001
2,4,5-TP	MR	2	2001
Pentachlorophenol	MR	2	2001
Total Polychlorinated Biphenyls (PCB)	MR	2	2001
1,2-DIBROMO-3-CHLOROPROPANE	MR	2	2001
ETHYLENE DIBROMIDE	MR	2	2001

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 Round Valley Agency.

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 090605073 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 9 — Tribal Water Systems Drinking Water Authority

EPA Region 9 — 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 09 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	RPT	16	SDWIS / 090605073 / 8000
2024	E. COLI	MR	2	SDWIS / 090605073 / 3014
2024	LEAD AND COPPER RULE REVISIONS	RPT	1	SDWIS / 090605073 / 5200
2023	Nitrate	MR	11	SDWIS / 090605073 / 1040
2022	Chlorine	MR	4	SDWIS / 090605073 / 0999
2022	Revised Total Coliform Rule	MON	3	SDWIS / 090605073 / 8000
2022	Public Notice	Other	2	SDWIS / 090605073 / 7500
2022	Groundwater Rule	TT	1	SDWIS / 090605073 / 0700
2020	Lead and Copper Rule	MR	10	SDWIS / 090605073 / 5000
2019	Total Haloacetic Acids (HAA5)	MR	2	SDWIS / 090605073 / 2456
2019	TTHM	MR	2	SDWIS / 090605073 / 2950
2015	Coliform (TCR)	MR	20	SDWIS / 090605073 / 3100
2011	Gross Alpha, Excl. Radon and U	MR	14	SDWIS / 090605073 / 4000
2011	Combined Uranium	MR	14	SDWIS / 090605073 / 4006
2011	Combined Radium (-226 and -228)	MR	14	SDWIS / 090605073 / 4010

How Round Valley Agency Compares

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

Metric	Round Valley Agency	EPA Region 9 — Tribal Water Systems avg	Federal benchmark
Total violations	318	-	SDWA compliance, any non-zero count is a recorded breach
Health-based violations	5	-	Indicates a contaminant exceeded a federal MCL
PFAS detection	None	-	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	84	-	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 9 — 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 Round Valley Agency water safe to drink? ▼

Round Valley Agency (PWS ID: 090605073) has 318 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 84 people using Groundwater sources.

How many people does Round Valley Agency serve? ▼

Round Valley Agency serves 84 people in Covelo, EPA Region 9 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 30 service connections.

What type of violations does Round Valley Agency have? ▼

Round Valley Agency has 318 total violations: 5 health-based violations (MCL exceedances or treatment failures), 183 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Round Valley Agency water? ▼

No PFAS testing data is available for Round Valley Agency under the EPA's UCMR5 monitoring program.

What water source does Round Valley Agency use? ▼

Round Valley Agency 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.