01The verdict: is Dalton Gardens water safe?
Based on EPA testing data, Dalton Gardens's tap water is generally safe to drink. The water system earned a grade of A (93.1/100), meeting federal drinking water standards across key contaminant categories. The city's 1 water system serves approximately 2,598 residents using groundwater (wells).
Nothing over a legal limit
Every contaminant measured in Dalton Gardens's water is within its EPA limit, and no violations are unresolved.
See the testing ↓Monitoring is on schedule
The system is meeting its EPA monitoring and reporting requirements — testing is happening when it should.
See the score ↓A flood-prone service area
5 federal disaster declarations on record. After severe weather, watch for boil-water advisories.
See the risk factors ↓Dalton Gardens's drinking water received a grade of A (93.1 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 2,598 residents using groundwater.
Lead levels were measured at 6.0 ppb (90th percentile), which is within EPA limits but above recommended levels. This system has not yet been tested for PFAS under the EPA UCMR 5 program. The system has 19 violations on record, including 6 health-based violations. All violations have been resolved.
Dalton Gardens ranks #9 out of 139 cities in Idaho for water quality, placing it one of the best in the state. Dalton Gardens relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff. While lead levels are within EPA limits, they are above the recommended 5 ppb threshold that health organizations consider ideal. A point-of-use filter adds an extra layer of protection. As a small community water system, Dalton Gardens may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in Dalton Gardens's water
Every contaminant flagged in Dalton Gardens, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 6.0 | 15 | ppb | Inorganic | Safe |
Cities ranked by 90th-percentile lead PF PFAS in Idaho
Cities ranked by compounds detected Cu Copper in Idaho
Cities ranked by 90th-percentile copper
03Dalton Gardens's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 19 violations on record, including 6 health-based violations. All violations have been resolved.
8 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
▲ Up 3 ppb since 1998. Latest reading: 6 ppb (2023) — 40% of the action level. Sampled at higher-risk homes (90th percentile).
04Where Dalton Gardens's water comes from
Dalton Gardens's drinking water is drawn from underground aquifers through wells.
Groundwater
Underground aquifers reached by wells — naturally filtered, but can carry minerals like arsenic and nitrate.
Local treatment
Groundwater generally needs less treatment — typically disinfection and, where needed, mineral removal.
1 system
1 water system, operated under local government ownership.
2,598 people
Residents served across Dalton Gardens's service area.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals. Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds. The system is operated by local government ownership and serves approximately 2,598 people through 1 water system.
| System name | PWSID | Population | Source |
|---|---|---|---|
| DALTON WATER ASSN INC | ID1280059 | 2,598 | Groundwater |
Water bodies near Dalton Gardens
These water bodies shape the regional watershed and can indirectly affect groundwater quality.
05Pressure on Dalton Gardens's watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Industrial discharge
4 facilities within 10 miles reported 0 lb released to surface water in the latest EPA Toxics Release Inventory. Proximity doesn't equal tap contamination — treatment and hydrology decide — but it's pressure on the watershed.
Flood & storm history
5 federal disaster declarations on record for Kootenai County. Flooding and severe storms can overwhelm treatment plants, cause sewage overflows, and push runoff into supplies.
Drought
Kootenai County is in D2 (severe drought) per the U.S. Drought Monitor (week of Jul 2026). Drought can raise disinfection-byproduct levels and taste/odor issues as utilities draw from lower reservoirs.
06How Dalton Gardens compares
Scores for nearby Idaho cities on one line, with the average marked.
dashed line = Idaho average (43/100)
Dalton Gardens scores 93.1/100 — above the Idaho average of 43/100. It outscores 10 of 10 nearby cities. Full Idaho rankings →
33.6 / 100FMeridian, ID
42.9 / 100FNampa, ID
41.8 / 100DIdaho Falls, ID
46.6 / 100FCaldwell, ID
38.5 / 100FPocatello, ID
42.5 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
07What to do at home
Steps matched to what testing actually found in Dalton Gardens's water — not generic advice.
Filter drinking & cooking water
Basic carbon filter for extra protection. Lead detected at 6.0 ppb
Compare tested filters →Flush taps & check your service line
Lead leaches from pipes as water sits. Run cold water 30 seconds before drinking (especially mornings), and ask the utility whether your address still has a lead service line.
Lead risks explained →Watch for Dalton Gardens alerts
This area has a history of flood declarations — after severe weather, watch for boil-water advisories from the utility, and check the live alerts on this page.
All water alerts →Frequently asked questions
Is Dalton Gardens, ID tap water safe to drink?
Dalton Gardens's water quality earned a grade of A (93.1/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #9 out of 139 cities tested in Idaho.
What contaminants are in Dalton Gardens's water?
Lead was measured at 6.0 ppb (90th percentile). 19 violations are on record.
How is Dalton Gardens's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Dalton Gardens?
While lead levels are within EPA limits, a filter adds extra protection. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Dalton Gardens's water come from?
Dalton Gardens's water is sourced from Groundwater. The city has 1 water system serving approximately 2,598 residents.
What health violations has Dalton Gardens's water system had?
Dalton Gardens has 6 health-based violations on record. The most recent violation was recorded in January 2020. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. All health violations have been resolved.
Is Dalton Gardens's groundwater at risk of contamination?
Dalton Gardens uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 19 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Dalton Gardens's water compare to other cities?
Dalton Gardens ranks #9 out of 139 cities in Idaho (better than 94% of state cities) and #956 out of 15382 cities nationally (94th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Dalton Gardens's small water system affect quality?
Dalton Gardens's system serves approximately 2,598 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 19 violations on record.