ZIP Code 97864
Grant County, Oregon — Monument
What This Means
Grant County, Oregon has moderately hard water, estimated at 104 mg/L (PPM). At this level, you may notice some mineral buildup on fixtures and inside appliances over time. A water softener is optional but can help extend appliance life. Most people don't notice significant issues at this hardness level.
What You Should Do
Hardness Details
| ZIP Code | 97864 |
| County | Grant |
| City | Monument |
| State | Oregon (OR) |
| Hardness (PPM) | 104 mg/L — Moderately Hard |
| Hardness (GPG) | 6.1 grains/gallon |
| Classification | 61 - 120 mg/L |
Source: USGS Water Quality Portal, county-level median
Your Water Utility
| Utility Name | MONUMENT, CITY OF |
| System ID | OR4100541 |
| Water Source | Ground water |
ⓘ Your utility may treat water before delivery, which can change hardness levels. Check your utility's annual Consumer Confidence Report (CCR) for exact hardness values.
USGS Monitoring Data
| Monitoring Stations | 22 |
| Range | 0 – 809 mg/L |
| Most Recent Data | 2024 |
| Data Quality | Measured |
Source: USGS Water Quality Portal
Effects at 104 PPM Hardness
At 104 ppm, some minor effects are possible: slight soap scum on shower doors, occasional water spots on dishes and glassware. Sensitive skin may notice dryness after showers. Appliance efficiency is minimally affected, but you may see light mineral deposits on faucets over time.
Is Monument Water Safe to Drink?
Yes. Hard water at 104 ppm in Monument is safe to drink. The calcium and magnesium that make water hard are actually essential minerals your body needs daily. The World Health Organization confirms there are no health-based guidelines for water hardness.
At this level, taste is generally good. Most people will not notice a mineral flavor, and the water is perfectly suitable for drinking, cooking, and making coffee or tea.
Your Water vs National Average
Monument water at 104 ppm is 4% harder than the US average of approximately 100 ppm. This is close to the national average. While not urgently requiring treatment, monitoring for scale buildup is advisable.
Best Solution for 104 PPM Water
Consider a shower filter ($15–40) for skin and hair benefits. At 104 ppm, a KDF or vitamin C shower filter can reduce mineral contact during bathing. A whole-house salt-free conditioner ($300–800) is an optional but effective way to prevent minor scale buildup on fixtures and appliances without adding sodium to your water.
Grant County Water Hardness Map
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Frequently Asked Questions
What is the water hardness for ZIP code 97864?
ZIP code 97864 is in Grant County, Oregon, with estimated water hardness of 104 mg/L (6.1 GPG), classified as moderately hard. The area is served by MONUMENT, CITY OF.
Do I need a water softener in 97864?
With moderately hard water at 104 PPM, a water softener is optional. You may notice some minor scale buildup over time.
What county is ZIP code 97864 in?
ZIP code 97864 is in Grant County, Oregon (OR).
Is Monument water hard or soft?
Monument water is classified as moderately hard with an estimated hardness of 104 ppm (6.1 GPG). This is moderately hard — some minor mineral effects may be noticeable.
Is hard water in 97864 safe to drink?
Yes, hard water in ZIP code 97864 at 104 ppm is safe to drink. The calcium and magnesium minerals are actually beneficial for your health. At this level, the water tastes normal and requires no filtration for drinking purposes.
Will 104 PPM water damage my appliances?
At 104 ppm (moderately hard), minor scale buildup is possible over many years but significant appliance damage is unlikely. Regular descaling maintenance is sufficient.
Do I need a water softener in Grant County?
Grant County has moderately hard water at 104 ppm. A softener is optional but can help if you notice dry skin or minor scale.
Is Monument water OK for aquariums and plants?
Generally yes. At 104 ppm, most freshwater fish and plants will do fine. Check species-specific requirements for sensitive fish.