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Tap water quality report

Arrowrock Ranch

EPA monitoring tested this supplier for 66 contaminants and detected 6. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

66
contaminants tested
6
detected
250
people served
4
health-based violations
Idaho rankingsLead in IdahoPFAS in Idaho
Water source
Ground water
Ownership
Private
Counties served
Ada

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.

4
health-based violations
107
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2013-12-01 → 2013-12-31
MCL Health-based Archived 2013-12-01 → 2013-12-31
MCL Health-based Archived 2013-12-01 → 2013-12-31
MCL Health-based Archived 2007-01-01 → 2007-01-31
MR Monitoring Archived 2008-04-01 → 2008-06-30
MR Monitoring Archived 2008-04-01 → 2008-06-30
MR Monitoring Resolved 2007-07-01
MR Monitoring Archived 2007-04-01 → 2007-06-30
MR Monitoring Archived 2007-04-01 → 2007-06-30
MR Monitoring Archived 2007-04-01 → 2007-06-30

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
Nitrate
2700 µg/L 27%
of the EPA limit 10000 µg/L
 30/32 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2024
Combined Uranium
5 µg/L 17%
of the EPA limit 30 µg/L
 4/4 SYR4 2013–2019
Fluoride
220 µg/L 5.5%
of the EPA limit 4000 µg/L
 4/4 SYR4 2013–2016
Nitrate-Nitrite
2300 µg/L 23%
of the EPA limit 10000 µg/L
 2/2 SYR4 2019
Arsenic
2.5 µg/L 25%
of the EPA limit 10 µg/L
 1/4 SYR4 2013–2016
60 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-DAntimony, TotalAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SQUIRES, LARRY
Phone
208-888-9946
Email
larry@westparkco.com

Frequently asked questions about Arrowrock Ranch

Is Arrowrock Ranch tap water safe to drink?

EPA monitoring detected 6 contaminants in Arrowrock Ranch'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 Arrowrock Ranch's water?

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

How many people does Arrowrock Ranch serve?

Arrowrock Ranch reports serving 250 people in Idaho, per its EPA record.

Has Arrowrock Ranch had any water quality violations?

The EPA has 107 violations on file for Arrowrock Ranch, of which 4 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.