Mountain Sage water quality
Met every federal limit. 0 contaminants at half a limit or higher. hardness not in the latest CCR.
ID4200073. Data through 2026-08-18. DEQ record.
What's in it
Nothing flagged. Every contaminant tested in the latest 36 months was not detected or below half its limit.
10 other contaminants tested, not detected or well below the limit
Copper 0.00ppm Gross Alpha ND HFPO-DA (GenX) ND Lead 3.0ppb Nitrate (as N) 1.20ppm PFHxS ND PFNA ND Radium 226 + 228 ND Total Trihalomethanes 1.2ppb Uranium ND
Filters that match
Aquasana OptimH2O Reverse Osmosis + Claryum
under sink ro · diy
Nothing in this water is flagged. This is a taste and general-purpose choice, not a fix.
Nothing in this water calls for whole-house treatment. A drinking-water filter covers the exposure that matters. Whole-house units here are optional, mainly for taste and chlorine.
Detections ranked by share of the limitevery Tier 1 detection, highest first
Bar length is the highest result in the last 36 months as a share of the federal limit (MCL, or action level for lead and copper). The dark tick marks the limit. Gross alpha is compared after subtracting uranium, as DEQ does for compliance.
Full contaminants reporthighest, latest, limit, trend, last sample
| Contaminant | Highest, 36 mo | Federal limit | Share of limit | Status | Trend | Last sample |
|---|---|---|---|---|---|---|
| Copper 90th percentile at home taps note | 0.00ppm | 1.30ppm AL | Detected | 2025-12-31 | ||
| Gross Alpha | ND | 15.0pCi/L MCL | Not detected | 2026-05-26 | ||
| HFPO-DA (GenX) | ND | 10.0ppt MCL | Not detected | 2025-02-25 | ||
| Lead 90th percentile at home taps note | 3.0ppb | 15.0ppb AL | Detected | 2025-12-31 | ||
| Nitrate (as N) | 1.20ppm latest 1.10ppm | 10.00ppm MCL | Detected | 2026-01-06 | ||
| PFHxS | ND | 10.0ppt MCL | Not detected | 2025-02-25 | ||
| PFNA | ND | 10.0ppt MCL | Not detected | 2025-02-25 | ||
| Radium 226 + 228 | ND | 5.00pCi/L MCL | Not detected | 2026-05-26 | ||
| Total Trihalomethanes | 1.2ppb | 80.0ppb MCL | Detected | 2026-08-18 | ||
| Uranium | ND | 30.0ppb MCL | Not detected | 2026-08-18 |
- Copper: 90th percentile of samples taken at customer taps. Results depend on the home's plumbing.
- Lead: 90th percentile of samples taken at customer taps. Results depend on the home's plumbing.
ppb = parts per billion (µg/L), ppm = parts per million (mg/L), ppt = parts per trillion. ND = not detected above the lab's reporting limit. MCL = federal maximum contaminant level; AL = action level for lead and copper (90th percentile of home taps); aesthetic = secondary standard for taste, odor or staining, not health. Bars show the highest result in 36 months as a share of the limit.
6 other regulated contaminants tested
| Contaminant | 36 mo max | Limit | Status | Last sample |
|---|---|---|---|---|
| Atrazine | ND | 3.0ppb | Not detected | 2026-05-26 |
| Benzene | ND | 5.0ppb | Not detected | 2026-08-18 |
| 1,2-Dibromo-3-chloropropane | ND | 0.2ppb | Not detected | 2026-05-26 |
| Tetrachloroethylene | ND | 5.0ppb | Not detected | 2026-08-18 |
| Sodium | 10.10ppm | none | Detected | 2025-04-29 |
| Trichloroethylene | ND | 5.0ppb | Not detected | 2026-08-18 |
Hardness
Hardness is not reported in the latest CCR. Hardness not reported for this system; softener sizing uses a regional default of 11.7 gpg until a CCR value is reviewed.
Track record129 violations on record, 2 health-based
✓ no violation recorded n monitoring or reporting only n includes a health-based violation ? outside the loaded record
Health-based violations
| Period | What happened | Contaminant | Rule | Status |
|---|---|---|---|---|
| 2025-02-01 to 2025-02-28 | Maximum contaminant level exceeded | n/a | Revised Total Coliform Rule | resolved 2025-06-24 |
| 2024-10-17 | Treatment technique not met (Level 2 assessment, treatment technique (RTCR)) | n/a | Lead and Copper Rule Revisions | resolved 2025-03-17 |
Monitoring and reporting violations (127)
A required sample or report was late or missing. These do not mean a contaminant was found, but a system that skips monitoring has gaps in its record.
| Year | Rule | Count | Detail |
|---|---|---|---|
| 2025 | Volatile Organic Chemicals | 42 | Routine monitoring, major · Benzene, Tetrachloroethylene, Trichloroethylene |
| 2025 | Synthetic Organic Chemicals | 58 | Routine monitoring, major · 1,2-Dibromo-3-chloropropane, Atrazine |
| 2025 | Radionuclides | 8 | Routine monitoring, major · Gross Alpha, Radium 226 + 228, Uranium |
| 2025 | Public Notification Rule | 1 (1 open) | Public notice rule linked to violation |
| 2024 | Lead and Copper Rule Revisions | 1 | |
| 2023 | Inorganic Chemicals | 10 | Routine monitoring, major · Antimony, Barium, Beryllium, Cadmium, Chromium (total), Fluoride, Mercury (inorganic), Selenium, Thallium |
| 2023 | Arsenic | 1 | Routine monitoring, major · Arsenic |
| 2022 | Revised Total Coliform Rule | 1 | Monitoring, routine (RTCR) |
| 2022 | Ground Water Rule | 1 | Monitoring, routine minor · E. coli |
| 2018 | Ground Water Rule | 1 | |
| 2017 | Ground Water Rule | 1 | Monitoring, routine minor · E. coli |
| 2016 | Lead and Copper Rule | 1 (1 open) | Lead service line replacement (LCR) |
| 2013 | Public Notification Rule | 1 (1 open) | Public notice rule linked to violation |
Lead and copper at the tap90th percentile of sampled homes against the action level
90th percentile of samples taken at customer taps. Results depend on the home's plumbing. Results are from sampled homes in this system, not from your tap. Home plumbing can add lead and copper. First-draw samples run higher than flushed ones.
90th percentile of samples taken at customer taps. Results depend on the home's plumbing. Results are from sampled homes in this system, not from your tap. Home plumbing can add lead and copper. First-draw samples run higher than flushed ones.
Where the water comes from2 active wells
2 active wells, and 0 treatment points on record (SDWIS counts each chlorination or filtration point as a treatment plant).
WELL #1: Susceptibility: ioc moderate, voc moderate, soc moderate, microbial high (auto).
Source water assessment susceptibility: final map[IOC:Moderate Microbials:Auto High SOC:Moderate VOC:Moderate]; hydrologic sensitivity H; pci land use map[IOC:M Microbials:M SOC:M VOC:M]; system construction M;
Source names (2)
WELL #1, WELL #2
Every match, by categorytop three per category
We may earn a commission if you buy through these links. Rankings come from the matching engine (certification + flagged contaminants + annual cost), not from who pays more. How we earn money. As an Amazon Associate we earn from qualifying purchases. Prices are not shown; Amazon sets them on its site.
Drinking water
Under sink, pitcher, or faucet. Treats the water you drink and cook with.
Aquasana OptimH2O Reverse Osmosis + Claryum
Certified for nitrate, total trihalomethanes, and lead (NSF/ANSI 58, NSF/ANSI 53).
Plumber recommended if you are not comfortable with a drain saddle and a tank. Not a whole-house solution.
Brondell Circle RC100 Reverse Osmosis System
Certified for total trihalomethanes, lead, and copper (NSF/ANSI 53, NSF/ANSI 58).
Plumber recommended if you are not comfortable with a drain saddle and a tank. Not a whole-house solution.
Clearly Filtered Water Pitcher
Certified for total trihalomethanes and lead (NSF/ANSI 53); manufacturer-reported for nitrate.
DIY. No plumbing.
Whole house
Installed where water enters the house. For fixtures, laundry and showers.
Nothing in this water calls for whole-house treatment. A drinking-water filter covers the exposure that matters. Whole-house units here are optional, mainly for taste and chlorine.
Aquasana Rhino EQ-1000 Whole House Filter (1,000,000 gallons)
Manufacturer-reported reduction for total trihalomethanes. Not NSF-certified for total trihalomethanes.
Plumber recommended if you are not comfortable with this install.
Express Water WH300SCKS 3-Stage Heavy Metal Whole House Filter (Sediment, KDF, Carbon)
Manufacturer-reported reduction for lead. Not NSF-certified for lead.
Plumber recommended if you are not comfortable with this install.
Sprite High Output 2 Universal Shower Filter with 3-Setting Shower Head (HO2-WH-M)
No certified coverage for the flagged contaminants.
DIY. No plumbing.
Softener or conditioner
Worth it at 7 grains per gallon or more.
Aquasure Serene Lite 650K Salt-Free Water Conditioner with Triple Purpose Pre-Filter
No certified coverage for the flagged contaminants.
Plumber recommended if you are not comfortable with this install.
Whirlpool WHES30E 30,000 Grain Water Softener
No certified coverage for the flagged contaminants.
DIY if you are comfortable with this install.
Whirlpool WHES40E 40,000 Grain Water Softener
No certified coverage for the flagged contaminants.
DIY if you are comfortable with this install.
Questions about Mountain Sage
Is Mountain Sage tap water safe to drink?
Mountain Sage met every federal limit in the last 36 months, with no open health-based violation. 0 contaminants were at half the limit or higher: . The results table shows each value against its limit. Results reflect the system's sampling points, not the plumbing in any one home.
Is Mountain Sage water hard?
Hardness has not been reported for Mountain Sage in a reviewed Consumer Confidence Report yet. The softener sizing widget uses a labelled county default until a report is reviewed.
Is Mountain Sage water fluoridated?
No fluoride result in the last 36 months.
Where does Mountain Sage water come from?
Mountain Sage draws from 2 active wells. Source and treatment details are listed above.
What filter fits Mountain Sage water?
For drinking water the matching engine ranks Aquasana OptimH2O Reverse Osmosis + Claryum first for this profile, based on certified reduction claims for the contaminants flagged above. See the filters section for the reasoning and alternatives.
Who to call
- System contact: CRUSE, KAYSA, 203-464-7636
- DEQ Boise Regional Office, 1445 N Orchard St, Boise ID 83706, (208) 373-0550
- Central District Health (well testing, septic, local health questions)
Sources
Sample results as of 2026-08-18; inventory and violations from EPA SDWIS; page built 2026-09-14. 69 individual results reviewed.
More: Elmore County
Numbers are the system's samples at its taps and wells, not yours. Lead and copper are 90th percentiles from sampled homes. Well pages are nearby-sample estimates. Health text restates EPA and DEQ. Methodology.