Is Rock Valley Rural Water District Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
Counties served: Sioux

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2016-08-01 → 2016-08-31
TT	Health-based	Resolved	2016-08-01 → 2016-08-31
TT	Health-based	Resolved	2016-08-01 → 2016-08-31
MCL	Health-based	Resolved	1993-04-01 → 1993-04-30
MCL	Health-based	Resolved	1993-04-01 → 1993-04-30
MCL	Health-based	Resolved	1993-04-01 → 1993-04-30
MCL	Health-based	Resolved	1993-04-01 → 1993-04-30
MCL	Health-based	Resolved	1993-04-01 → 1993-04-30
MCL	Health-based	Resolved	1993-04-01 → 1993-04-30
MR	Monitoring	Resolved	2005-08-01 → 2005-08-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	370 µg/L 28% of the EPA limit 1300 µg/L	27/30	SYR4	2012–2018
Nitrate	4400 µg/L 44% of the EPA limit 10000 µg/L	14/14	SYR4	2012–2019
Lead	0.0024 mg/L 16% of the EPA limit 0.0150 mg/L	13/13	LCR	2025
Lead	6 µg/L 40% of the EPA limit 15 µg/L	10/30	SYR4	2012–2018
Bromodichloromethane	14 µg/L No EPA limit set	9/9	SYR4	2012–2019
Bromoform	2.9 µg/L No EPA limit set	9/9	SYR4	2012–2019
Chloroform	18 µg/L No EPA limit set	9/9	SYR4	2012–2019
Dibromoacetic Acid	4 µg/L No EPA limit set	9/9	SYR4	2012–2019
Dibromochloromethane	14 µg/L No EPA limit set	9/9	SYR4	2012–2019
Dichloroacetic Acid	10 µg/L No EPA limit set	9/9	SYR4	2012–2019
TTHM	41 µg/L 51% of the EPA limit 80 µg/L	9/9	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	19 µg/L 32% of the EPA limit 60 µg/L	7/9	SYR4	2012–2019
Trichloroacetic Acid	7 µg/L No EPA limit set	7/9	SYR4	2012–2019

38 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAtrazineBenzeneBenzo(A)PyreneChlorobenzeneCarbon TetrachlorideCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylbenzeneGlyphosateLassoMonobromoacetic AcidMonochloroacetic AcidPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ROCK VALLEY RURAL WATER DISTRICT
Phone: 712-476-5246
Email: rvruralwater@premieronline.net

Frequently asked questions about Rock Valley Rural Water District

Is Rock Valley Rural Water District tap water safe to drink?

EPA monitoring detected 13 contaminants in Rock Valley Rural Water District's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Rock Valley Rural Water District's water?

EPA monitoring detected Copper, Nitrate, Lead, Lead, Bromodichloromethane, and others. The full list with the level and data source for each is above.

How many people does Rock Valley Rural Water District serve?

Rock Valley Rural Water District reports serving 2,230 people in Iowa, per its EPA record.

Has Rock Valley Rural Water District had any water quality violations?

The EPA has 54 violations on file for Rock Valley Rural Water District, of which 9 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.