Compared to the same period last year, water quality improved in the second quarter of 2024. The proportion of cities with "excellent" or "good" water quality increased from 62.6% to 68.1%, while those with "fair" water quality decreased from 28.0% to 24.7%. Cities with "poor" water quality rose slightly from 6.1% to 5.0%, and those with "very poor" water quality decreased from 3.3% to 2.2%.