In Solan district, the developmental activities associated with chemical based farming, rapid urbanization, and rampant industrialization have led to many diarrhoeal, gastroenteritis, and hepatitis disease outbreaks. This has necessitated for microbiological assessment of indicator organisms, the thermotolerant coliforms, in drinking water sources, and their relationship with diarrhoeal disease. All the 49 Public Health Institutes (PHIs) of the district were categorized into very low, low, moderate, and high disease burden regions by stratification method. For drinking water, 55.5, 16.5, and 17% people preferred springs, borewells, and hand-pump respectively. These sources inventoried by Knowledge, Attitude, and Practice survey in one of very low and seven of high disease burden regions, and were analyzed by multiple tube fermentation technique. A cross-sectional survey of 200 children was undertaken for diarrhoeal disease estimation. Parwanoo, an industrial and Kurgal, a non industrial region witnessed highest (30.20) and lowest (4.40) Most Probable Number (MPN) per 100 ml water of thermotolerant coliforms, respectively. Thermotolerant coliforms were also observed significantly more (16.77 MPN/100 ml water) in monsoon than in post monsoon season (9.04 MPN per 100 ml water). The thermotolerant coliform Escherichia coli was recovered from six and three water sources respectively during monsoon and post monsoon. A strong correlation (r = 0.78) existed between the diarrhoeal disease occurrence and the concentration of thermotolerant coliforms in monsoon whereas it was moderate (r = 0.61) in post monsoon. The study indicated more contamination of water sources due to industrial activities which further got aggravated during the rainy season of the region.

在索兰区，与化学种植，快速的城市化和猖ramp的工业化相关的发展活动已导致许多腹泻，胃肠炎和肝炎疾病暴发。这就需要对饮用水源中的指示生物，耐热大肠菌群进行微生物学评估，以及它们与腹泻病的关系。通过分层方法将该地区的所有49家公共卫生研究所（PHI）划分为极低，低，中和高疾病负担区域。对于饮用水，分别有55.5％，16.5％和17％的人更喜欢泉水，井筒和手动泵。由知识，态度和实践调查对这些来源进行了盘点，这些疾病来自极低的疾病负担区和七个高疾病负担区，并通过多管发酵技术进行了分析。为了估计腹泻病，对200名儿童进行了横断面调查。每100毫升耐热大肠菌群水分别以工业最高的地区Parwanoo和非工业地区的库尔加尔地区的最高概率（MPN）最高（30.20）和最低（4.40）。季风后还观察到耐热大肠菌群（16.77 MPN / 100 ml水）明显多于季风后季节（每100 ml水9.04 MPN）。耐热大肠菌群 季风之后的季风量为77 MPN / 100毫升水（每100毫升水9.04 MPN）。耐热大肠菌群 季风之后的季风量为77 MPN / 100毫升水（每100毫升水9.04 MPN）。耐热大肠菌群季风期间和季风后分别从六个和三个水源中回收大肠杆菌。腹泻病的发生与季风后耐热大肠菌群的浓度之间存在很强的相关性（r = 0.78），而季风后则是中等水平（r = 0.61）。研究表明，由于工业活动，水源受到了更多的污染，在该地区的雨季期间污染进一步加剧。