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Tap water quality report

Rock County Rural Water

EPA monitoring tested this supplier for 63 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

63
contaminants tested
14
detected
2,919
people served
0
health-based violations
Minnesota rankingsLead in MinnesotaPFAS in Minnesota
Water source
SWP
Ownership
Local government
Counties served
Rock

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.

0
health-based violations
12
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2015-11-01 → 2015-11-30
MR Monitoring Resolved 2015-11-01 → 2015-11-30
MR Monitoring Resolved 2015-11-01 → 2015-11-30
MR Monitoring Resolved 2015-10-01 → 2015-12-31
MR Monitoring Resolved 2015-10-01 → 2015-12-31
MR Monitoring Resolved 2015-10-01 → 2015-12-31
MR Monitoring Archived 1994-09-01 → 1994-09-30
MR Monitoring Archived 1994-09-01 → 1994-09-30
MR Monitoring Archived 1994-09-01 → 1994-09-30
MR Monitoring Archived 1993-06-01 → 1993-06-30

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
4030 µg/L 310%
of the EPA limit, in the worst sample — 1300 µg/L
 100/100 SYR4 2012–2019
Lead
54.2 µg/L 361%
of the EPA limit, in the worst sample — 15 µg/L
 73/100 SYR4 2012–2019
Nitrate-Nitrite
9300 µg/L 93%
of the EPA limit 10000 µg/L
 52/52 SYR4 2012–2019
Fluoride
1100 µg/L 28%
of the EPA limit 4000 µg/L
 33/33 SYR4 2012–2019
Bromodichloromethane
13 µg/L
No EPA limit set
 14/14 SYR4 2013–2019
Chloroform
20 µg/L
No EPA limit set
 14/14 SYR4 2013–2019
Dibromochloromethane
6.2 µg/L
No EPA limit set
 14/14 SYR4 2013–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2026
Dibromoacetic Acid
2 µg/L
No EPA limit set
 11/11 SYR4 2013–2019
Dichloroacetic Acid
11 µg/L
No EPA limit set
 11/11 SYR4 2013–2019
Trichloroacetic Acid
8.2 µg/L
No EPA limit set
 11/11 SYR4 2013–2019
Bromoform
0.7000 µg/L
No EPA limit set
 3/14 SYR4 2013–2019
Gross Alpha, Excl. Radon And U
3.9 pCi/L 26%
of the EPA limit 15 pCi/L
 2/2 SYR4 2013–2019
Monochloroacetic Acid
2.6 µg/L
No EPA limit set
 1/11 SYR4 2013–2019
49 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAtrazineBhc-GammaBenzeneBenzo(A)PyreneChlorobenzeneCyanideCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Phone
5072838886
Email
ryan.holtz@co.rock.mn.us

Frequently asked questions about Rock County Rural Water

Is Rock County Rural Water tap water safe to drink?

EPA monitoring detected 14 contaminants in Rock County Rural Water'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 County Rural Water's water?

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

How many people does Rock County Rural Water serve?

Rock County Rural Water reports serving 2,919 people in Minnesota, per its EPA record.

Has Rock County Rural Water had any water quality violations?

The EPA has 12 violations on file for Rock County Rural Water, of which 0 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.