Nacogdoches Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
reservoir
pH Level
8
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
244 mg/L
Est. Daily Cost
$0.40
energy & soap waste
Source: See methodology section below · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Nacogdoches, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Nacogdoches | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Nacogdoches compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Nacogdoches, Texas | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Lufkin, Texas | ≈ 180+ mg/L | 22.6 ppt | 🔴 Very Hard | groundwater |
| Henderson, Texas | ≈ 120–179 mg/L | 11.1 ppt | 🟠 Hard | reservoir |
| Jacksonville, Texas | ≈ 180+ mg/L | 29.2 ppt | 🔴 Very Hard | reservoir |
| Kilgore, Texas | ≈ 120–179 mg/L | 5.8 ppt | 🟠 Hard | reservoir |
National Benchmark
How Nacogdoches compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Nacogdoches | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Nacogdoches's Water Unique?
Local geology and source profile
The City of Nacogdoches Water Utilities Department serves approximately 33,980 residents in Nacogdoches County, Texas, operating a dual-source system. Surface water is drawn from Lake Nacogdoches, a reservoir that was 97.4% full as of May 2026, while groundwater is supplied by the Wilcox-Carrizo Aquifer, a deep formation underlying East Texas. The utility has been recognized by the Texas Commission on Environmental Quality (TCEQ) as a Superior Public Water System, with treatment employing conventional chlorine and chloramine disinfection.
The Wilcox-Carrizo Aquifer is a Paleocene-Eocene sandstone and shale formation — part of the Tertiary-age sedimentary sequence of East Texas — whose mineral-bearing strata yield naturally mineralized groundwater. Limestone-rich soils and the regional geological setting contribute dissolved calcium and magnesium ions to both the aquifer and Lake Nacogdoches surface supply, producing the characteristically hard water typical of this part of East Texas.
Scale buildup in water heaters, kettles, and appliances is common at this hardness level, potentially causing $1,400 or more in annual damage to household systems. Soap and detergent efficiency is reduced, affecting cleaning performance. Residents are advised to consider water softening systems for whole-house treatment to protect high-value appliances and extend their operational lifespan; regular descaling of water-using equipment is recommended. The utility reports three contaminants above EPA MCLGs, including 1,2,4-Trichlorobenzene and Chlordane; the TCEQ notes vulnerability of some sources to certain contaminants. Consult the annual Consumer Confidence Report for full compliance and lead/copper data.
Geology & Source: Lake Nacogdoches surface reservoir and Wilcox-Carrizo Aquifer (Paleocene-Eocene sandstone and shale); Tertiary-age sedimentary strata rich in calcium and magnesium-bearing minerals produce characteristically hard water in East Texas
Other Texas Water Reports
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Frequently Asked Questions
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Data Sources & Methodology
Water quality data for Nacogdoches is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.