Hardness
Very Hard
393 PPM · 23 GPG
Local water dashboard
Official source aggregationWater quality in Tacna, AZ 85352
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Yuma County.
2 reported benchmark flags
- Primary matched system
- Tacna Water Improvement District
- Source water
- Surface water + Groundwater
- County
- Yuma 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 mg/L
0% of action level
Utility match
3 systems
Serves 500 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
393 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
393
mg/L as CaCO₃ equivalent
Grains per gallon
23
1 GPG ≈ 17.1 PPM
What this means at home
At 393 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
41
Nearest site
23.1 mi
Observation range
Jan 12, 2016–Jun 10, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: GILA RIVER ABV S-AVE-20E NEAR FORTUNA FOOTHILLS AZ (Stream).USGS source documentation ↗
Regional context
Is 85352 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Tacna median
393 PPM
About the same1 indexed ZIP readings · Range 393–393 PPM
Arizona median
241 PPM
152 PPM higher285 indexed ZIP readings · Range 66.4–1250 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 pass2 fail
Lead (PB90)
0 mg/L
Reported Jun 30, 2026
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
3 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
Arsenic
Measured in MG/L
Local 0.018
EPA limit 0.01
Fluoride
Measured in MG/L
Local 4.1
EPA limit 4
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 117
- Health-based
- 41
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Surface Water Treatment Rule | AZ0414515 | Archived | Mar 1, 2026through Mar 31, 2026 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | AZ0414030 | Archived | Mar 1, 2026through Mar 31, 2026 |
| Surface Water Treatment Rule | AZ0414515 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Surface Water Treatment Rule | AZ0414515 | Archived | Jan 1, 2026through Jan 31, 2026 |
| Revised Total Coliform Rule | AZ0414515 | Archived | Jan 1, 2026through Jan 31, 2026 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | AZ0414030 | Archived | Jan 1, 2026through Jan 31, 2026 |
| ArsenicHealth-basedReported 0.018 MG/L · MCL 0.01 | AZ0414107 | Archived | Jan 1, 2026through Mar 31, 2026 |
| FluorideHealth-basedReported 4.1 MG/L · MCL 4 | AZ0414107 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Surface Water Treatment Rule | AZ0414515 | Archived | Dec 1, 2025through Dec 31, 2025 |
| Chlorine | AZ0414515 | Archived | Dec 1, 2025through Dec 31, 2025 |
| Revised Total Coliform Rule | AZ0414515 | Archived | Dec 1, 2025through Dec 31, 2025 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | AZ0414030 | Archived | Dec 1, 2025through Dec 31, 2025 |
| Chlorine | AZ0414515 | Archived | Nov 1, 2025through Nov 30, 2025 |
| Revised Total Coliform Rule | AZ0414515 | Archived | Nov 1, 2025through Nov 30, 2025 |
| Surface Water Treatment Rule | AZ0414515 | Archived | Nov 1, 2025through Nov 30, 2025 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | AZ0414030 | Archived | Nov 1, 2025through Nov 30, 2025 |
| Public Notice | AZ0414030 | Resolved | Oct 25, 2025through Nov 28, 2025 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | AZ0414030 | Resolved | Oct 1, 2025through Oct 31, 2025 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | AZ0414030 | Archived | Oct 1, 2025through Oct 31, 2025 |
| Arsenic | AZ0414107 | Resolved | Oct 1, 2025through Dec 31, 2025 |
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 Tacna ZIP 85352 using 393 PPM nearby hardness and 3 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
393 PPM is 3× 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
Arsenic, Fluoride 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 Tacna
Is tap water safe in Tacna?+
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 393 PPM, or 23 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 393 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.