**Core Concept**
The World Health Organization (WHO) sets standards for water quality to ensure its safety for human consumption. These criteria involve assessing various parameters such as pH, temperature, turbidity, and the presence of microorganisms, inorganic and organic compounds.

**Why the Correct Answer is Right**
The WHO criteria for water quality include parameters like pH (6.5-8.5), temperature (5-25°C), turbidity (0.5 NTU), and the absence of pathogens like Escherichia coli (E. coli), fecal coliforms, and total coliforms. Additionally, inorganic compounds like nitrates (50 mg/L), fluoride (1.5 mg/L), and lead (0.01 mg/L) are considered. Organic compounds like pesticides and industrial chemicals are also monitored.

**Why Each Wrong Option is Incorrect**
**Option A:** Not provided.
**Option B:** Not provided.
**Option C:** Not provided.
**Option D:** Not provided.

**Clinical Pearl / High-Yield Fact**
The WHO guidelines for water quality are regularly updated to reflect the latest scientific evidence and emerging contaminants. These guidelines serve as a crucial reference for policymakers, water treatment professionals, and the public to ensure access to safe drinking water.

**Correct Answer: D.**