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Tap water quality report

Tyhee and S and N Estates Water Assn

EPA monitoring tested this supplier for 68 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

68
contaminants tested
11
detected
300
people served
4
health-based violations
Idaho rankingsLead in IdahoPFAS in Idaho
Water source
Ground water
Ownership
Private
Counties served
Bannock

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
40
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1999-12-01 → 1999-12-31
MCL Health-based Archived 1996-02-01 → 1996-02-29
MCL Health-based Archived 1996-01-01 → 1996-01-31
MCL Health-based Archived 1991-04-01 → 1991-04-30
MR Monitoring Resolved 2025-12-30
MR Monitoring Resolved 2025-12-30
MR Monitoring Resolved 2025-12-30
MR Monitoring Resolved 2016-12-30
MR Monitoring Resolved 2016-12-30
MR Monitoring Resolved 2016-12-30

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
8510 µg/L 85%
of the EPA limit 10000 µg/L
worst single sample: 8740 µg/L
44/44 SYR4 2012–2019
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2025
Combined Uranium
5.6755 µg/L 19%
of the EPA limit 30 µg/L
worst single sample: 5.95 µg/L
4/4 SYR4 2013–2019
Arsenic
6 µg/L 60%
of the EPA limit 10 µg/L
 2/2 SYR4 2019
Barium
86.8 µg/L 4.3%
of the EPA limit 2000 µg/L
worst single sample: 87 µg/L
2/2 SYR4 2019
Chromium
2 µg/L 2%
of the EPA limit 100 µg/L
 2/2 SYR4 2019
Fluoride
395 µg/L 9.9%
of the EPA limit 4000 µg/L
worst single sample: 400 µg/L
2/2 SYR4 2019
Gross Alpha, Excl. Radon And U
11.979 pCi/L 80%
of the EPA limit 15 pCi/L
worst single sample: 12.2 pCi/L
2/2 SYR4 2013
Nitrate-Nitrite
5214.5 µg/L 52%
of the EPA limit 10000 µg/L
worst single sample: 5340 µg/L
2/2 SYR4 2019
Selenium
8.75 µg/L 18%
of the EPA limit 50 µg/L
worst single sample: 9 µg/L
2/2 SYR4 2019
Combined Radium (-226 And -228)
0.1700 pCi/L 3.4%
of the EPA limit 5 pCi/L
 1/2 SYR4 2016
57 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-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SHEARER, MITCH
Phone
208-681-3423

Frequently asked questions about Tyhee and S and N Estates Water Assn

Is Tyhee and S and N Estates Water Assn tap water safe to drink?

EPA monitoring detected 11 contaminants in Tyhee and S and N Estates Water Assn'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 Tyhee and S and N Estates Water Assn's water?

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

How many people does Tyhee and S and N Estates Water Assn serve?

Tyhee and S and N Estates Water Assn reports serving 300 people in Idaho, per its EPA record.

Has Tyhee and S and N Estates Water Assn had any water quality violations?

The EPA has 40 violations on file for Tyhee and S and N Estates Water Assn, 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.