Hardness
Moderately Hard
88.9 PPM · 5.2 GPG
Local water dashboard
Official source aggregationWater quality in College Place, WA 99324
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Walla Walla County.
No active health-based violation reported
- Primary matched system
- College Place Water Dept
- Source water
- Groundwater
- County
- Walla Walla County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.0021 mg/L
14% of action level
Utility match
1 system
Serves 8,147 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
88.9 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
88.9
mg/L as CaCO₃ equivalent
Grains per gallon
5.2
1 GPG ≈ 17.1 PPM
What this means at home
At 88.9 PPM, mineral scale can build up on fixtures and heating elements, reduce soap lather, and leave visible spotting. Hardness is primarily an aesthetic and appliance concern—not itself a tap-water safety rating.
USGS sites used
107
Nearest site
0.2 mi
Observation range
Apr 21, 2016–Sep 29, 2025
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 07N/35E-36F03 PAS24 (Well).USGS source documentation ↗
Regional context
Is 99324 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
College Place median
89 PPM
About the same1 indexed ZIP readings · Range 88.9–88.9 PPM
Washington median
104 PPM
15 PPM lower189 indexed ZIP readings · Range 20.6–238 PPM
EPA benchmark screen
Contaminant snapshot
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
1 pass
Lead (PB90)
0.0021 mg/L
Reported Dec 31, 2023
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
1 comparable result
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.0021
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 100
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Pentachlorophenol | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| cis-1,2-Dichloroethylene | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| DICHLOROMETHANE | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| o-Dichlorobenzene | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| p-Dichlorobenzene | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| Vinyl chloride | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| Carbon tetrachloride | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| Trichloroethylene | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| 1,1,2-Trichloroethane | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| Benzene | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| Ethylbenzene | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| Styrene | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| trans-1,2-Dichloroethylene | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| 1,2-Dichloroethane | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| Dinoseb | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| CHLOROBENZENE | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| 2,4,5-TP | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| 1,1,1-Trichloroethane | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| 1,2-Dichloropropane | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| Toluene | WA5314050 | Resolved | Jul 1, 2022through Sep 30, 2022 |
No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.
Solutions matcher
Your personalized water action plan
Matched to College Place ZIP 99324 using 88.9 PPM nearby hardness and 1 reported measurement benchmarks.
No urgent match
Start with an independent water test
This profile does not trigger a treatment recommendation. Test at the tap before investing in equipment.
Affiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.
Frequently asked
Water questions for College Place
Is tap water safe in College Place?+
EPA ECHO shows no active health-based violation for the associated systems in this reporting snapshot. This does not prove every contaminant is absent; federal records can lag and household plumbing can change tap conditions.
How hard is the water?+
Nearby USGS observations produce an estimate of 88.9 PPM, or 5.2 grains per gallon, classified as moderately hard. This is not a household tap measurement.
Do I need a water softener?+
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.