Tap WaterIndex

← Idaho

Tap water quality report

Dalton Water Assn Inc

EPA monitoring tested this supplier for 41 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

41
contaminants tested
8
detected
2,602
people served
10
health-based violations
Idaho rankingsLead in IdahoPFAS in Idaho
Water source
Ground water
Ownership
Local government
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.

10
health-based violations
24
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2019-07-01 → 2019-07-31
MCL Health-based Resolved 2019-07-01 → 2019-07-31
MCL Health-based Resolved 2019-07-01 → 2019-07-31
MCL Health-based Resolved 2019-07-01 → 2019-07-31
MCL Health-based Resolved 2019-07-01 → 2019-07-31
MCL Health-based Archived 2002-09-01 → 2002-09-30
MCL Health-based Archived 2002-08-01 → 2002-08-31
MCL Health-based Archived 1996-10-01 → 1996-10-31
MCL Health-based Archived 1995-11-01 → 1995-11-30
MCL Health-based Archived 1995-10-01 → 1995-10-31

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
2327.5 µg/L 23%
of the EPA limit 10000 µg/L
worst single sample: 2330 µg/L
22/22 SYR4 2012–2019
Lead
0.0060 mg/L 40%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2023
Arsenic
3.494 µg/L 35%
of the EPA limit 10 µg/L
worst single sample: 3.74 µg/L
7/7 SYR4 2012–2019
Combined Radium (-226 And -228)
2.40595 pCi/L 48%
of the EPA limit 5 pCi/L
worst single sample: 2.5 pCi/L
2/2 SYR4 2013–2019
TTHM
4.1235 µg/L 5.2%
of the EPA limit 80 µg/L
worst single sample: 4.23 µg/L
2/2 SYR4 2018–2019
Barium
30 µg/L 1.5%
of the EPA limit 2000 µg/L
 1/1 SYR4 2019
Combined Uranium
2.13 µg/L 7.1%
of the EPA limit 30 µg/L
 1/1 SYR4 2016
Nitrate-Nitrite
2280 µg/L 23%
of the EPA limit 10000 µg/L
 1/1 SYR4 2019
33 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalAsbestosBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylbenzeneFluorideGross Alpha, Excl. Radon And UMercuryNitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)TrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
DALTON WATER ASSN INC
Phone
208-772-5639
Email
[email protected]

Frequently asked questions about Dalton Water Assn Inc

Is Dalton Water Assn Inc tap water safe to drink?

EPA monitoring detected 8 contaminants in Dalton Water Assn Inc'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 Dalton Water Assn Inc's water?

EPA monitoring detected Nitrate, Lead, Arsenic, Combined Radium (-226 And -228), TTHM, and others. The full list with the level and data source for each is above.

How many people does Dalton Water Assn Inc serve?

Dalton Water Assn Inc reports serving 2,602 people in Idaho, per its EPA record.

Has Dalton Water Assn Inc had any water quality violations?

The EPA has 24 violations on file for Dalton Water Assn Inc, of which 10 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.