Water hardness in Denham Springs
0.6 gpg soft
Tap water in Denham Springs is soft: 0.6 gpg (10 mg/L · 0.5 °dH · 1 °fH).
Source: City of Denham Springs 2025 Consumer Confidence Report (2025) · data checked 2026-11-12
The City of Denham Springs 2025 Consumer Confidence Report lists total hardness as CaCO3 at 9.6 mg/L (0.6 gpg), with a range of 9.3 to 9.6 mg/L. That is very soft water, consistent with the Southern Hills aquifer the system draws on. At this level scale is not an issue, and a softener is not needed for hardness.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 0.6 gpg |
|---|---|
| Utility | City of Denham Springs Water Department (PWSID LA1063004) |
How Denham Springs compares
- Tap water in Denham Springs is 94 % softer than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 1362 of 1372 in the United States (1 = hardest); 1 % of these cities have softer water.
- In Louisiana it is number 8 of 8 cities; the regional median is 4.7 gpg.
Ranking of the hardest and softest water in the United States →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Denham Springs
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 1 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Denham Springs water hard or soft?
It is soft: 10 mg/L as CaCO₃ (0.6 gpg, 0.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Denham Springs safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
How many grains per gallon is Denham Springs water?
0.6 gpg, equal to 0.5 °dH, 1 °fH or 10 mg/L calcium carbonate.
What dishwasher salt setting should I use in Denham Springs?
For 10 mg/L (0.5 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Denham Springs?
No. With soft water a softener adds nothing.
Source
Source: City of Denham Springs 2025 Consumer Confidence Report (2025). Method: figure published by the water supplier. City of Denham Springs 2025 Consumer Confidence Report · Outdated figure? Tell us