Hardness
Very Hard
487 PPM · 28.5 GPG
Local water dashboard
Official source aggregationWater quality in Apache, OK 73006
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Caddo County.
1 active health-based violation
- Primary matched system
- Apache
- Source water
- Groundwater
- County
- Caddo County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
1 active health-based record
Lead 90th percentile
0 mg/L
0% of action level
Utility match
1 system
Serves 1,521 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
487 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
487
mg/L as CaCO₃ equivalent
Grains per gallon
28.5
1 GPG ≈ 17.1 PPM
What this means at home
At 487 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
2
Nearest site
52.8 mi
Observation range
Aug 6, 2018–Aug 14, 2018
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 13N-07W-19 ADD 2 (Well).USGS source documentation ↗
Regional context
Is 73006 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Apache median
487 PPM
About the same1 indexed ZIP readings · Range 487–487 PPM
Oklahoma median
226 PPM
261 PPM higher148 indexed ZIP readings · Range 7–610 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 pass1 fail
Lead (PB90)
0 mg/L
Reported Dec 31, 2023
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0
EPA limit 0.015
Combined Uranium
Measured in UG/L
Local 31
EPA limit 30
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 31
- Health-based
- 5
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Nitrate-NitriteHealth-basedReported 17 MG/L | OK2000806 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Nitrate-NitriteHealth-basedReported 24 MG/L | OK2000806 | Archived | Oct 1, 2025through Dec 31, 2025 |
| Revised Total Coliform Rule | OK2000806 | Resolved | Apr 1, 2025through Apr 30, 2025 |
| Gross Alpha, Excl. Radon and U | OK2000806 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| Combined Uranium | OK2000806 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| Combined Radium (-226 and -228) | OK2000806 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| Gross Beta Particle Activity | OK2000806 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| Nitrate-NitriteHealth-basedReported 27 MG/L | OK2000806 | Archived | Jan 1, 2025through Dec 31, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | OK2000806 | Addressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | OK2000806 | Addressed | Oct 17, 2024 |
| Revised Total Coliform Rule | OK2000806 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| Combined Radium (-226 and -228) | OK2000806 | Resolved | Apr 1, 2024through Jun 30, 2024 |
| Gross Beta Particle Activity | OK2000806 | Resolved | Apr 1, 2024through Jun 30, 2024 |
| Gross Alpha, Excl. Radon and U | OK2000806 | Resolved | Apr 1, 2024through Jun 30, 2024 |
| Combined Uranium | OK2000806 | Resolved | Apr 1, 2024through Jun 30, 2024 |
| Gross Alpha, Excl. Radon and U | OK2000806 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| Combined Radium (-226 and -228) | OK2000806 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| Gross Beta Particle Activity | OK2000806 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| Combined Uranium | OK2000806 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| Combined Uranium | OK2000806 | Resolved | Oct 1, 2022through Dec 31, 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 Apache ZIP 73006 using 487 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
487 PPM is 4× the high-hardness trigger used by this matcher.
Designed to reduce scale on fixtures, water heaters, glassware, and plumbing throughout the home.
Compare whole-house systemsDrinking water protection
Under-Sink Reverse Osmosis System
Combined Uranium, LEAD AND COPPER RULE REVISIONS have a measured benchmark flag or active health-based SDWIS record in this profile.
A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.
Explore under-sink filtrationAffiliate 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 Apache
Is tap water safe in Apache?+
EPA ECHO reports 1 active health-based violation among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
How hard is the water?+
Nearby USGS observations produce an estimate of 487 PPM, or 28.5 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 487 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.