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Tap water quality report

Twin Lakes Service Area

EPA monitoring tested this supplier for 40 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

40
contaminants tested
9
detected
2,023
people served
2
health-based violations
Idaho rankingsLead in IdahoPFAS in Idaho
Water source
Ground water
Ownership
Mixed public/private
Counties served
Kootenai

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.

2
health-based violations
17
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1999-09-01 → 1999-09-30
MCL Health-based Archived 1995-07-01 → 1995-07-31
MR Monitoring Archived 2006-04-01 → 2006-06-30
MR Monitoring Archived 1999-09-01 → 1999-09-30
MR Monitoring Archived 1999-09-01 → 1999-09-30
MR Monitoring Archived 1999-07-01 → 1999-07-31
MR Monitoring Archived 1995-08-01 → 1995-08-31
MR Monitoring Archived 1994-10-01 → 1994-10-31
MR Monitoring Archived 1993-10-01 → 1993-10-31
MR Monitoring Archived 1979-10-01 → 1979-10-31

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 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
392.7 µg/L 3.9%
of the EPA limit 10000 µg/L
worst single sample: 440 µg/L
32/54 SYR4 2012–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2024
Arsenic
6.5575 µg/L 66%
of the EPA limit 10 µg/L
worst single sample: 6.6 µg/L
6/7 SYR4 2013–2019
Nitrate-Nitrite
336.2 µg/L 3.4%
of the EPA limit 10000 µg/L
worst single sample: 340 µg/L
3/3 SYR4 2019
Gross Alpha, Excl. Radon And U
0.6329 pCi/L 4.2%
of the EPA limit 15 pCi/L
worst single sample: 0.6600 pCi/L
2/2 SYR4 2016
Barium
21 µg/L 1.1%
of the EPA limit 2000 µg/L
 1/2 SYR4 2019
Combined Radium (-226 And -228)
0.7130 pCi/L 14%
of the EPA limit 5 pCi/L
 1/2 SYR4 2013–2016
Combined Uranium
1.04 µg/L 3.5%
of the EPA limit 30 µg/L
 1/2 SYR4 2016
TTHM
0.3800 µg/L 0.5%
of the EPA limit 80 µg/L
 1/10 SYR4 2013–2019
31 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylbenzeneFluorideMercuryNitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)TrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SCHEIDT, SUZANNE
Phone
208-687-6593
Email
[email protected]

Frequently asked questions about Twin Lakes Service Area

Is Twin Lakes Service Area tap water safe to drink?

EPA monitoring detected 9 contaminants in Twin Lakes Service Area'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 Twin Lakes Service Area's water?

EPA monitoring detected Nitrate, Lead, Arsenic, Nitrate-Nitrite, Gross Alpha, Excl. Radon And U, and others. The full list with the level and data source for each is above.

How many people does Twin Lakes Service Area serve?

Twin Lakes Service Area reports serving 2,023 people in Idaho, per its EPA record.

Has Twin Lakes Service Area had any water quality violations?

The EPA has 17 violations on file for Twin Lakes Service Area, of which 2 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.