Public Water Supply and Sanitation Authorities for Strategic Sustainable Domestic Water Management. A Case of Iringa Region In Tanzania
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. Water Quality
2.2.1. Water Quality Assessment—Heavy Metals
2.2.2. Water Quality Trends
2.2.3. Water Quality Perception
2.3. Water Quantity
Assessment of WSSA Current Practices
3. Results and Discussion
3.1. Limitation of the Study
3.2. Quality Aspect
3.2.1. Water Testing
Privately Owned Water Sources
- ○
- Water samplings are greatly emphasized at sources or intakes rather than existing domestic points. It takes a long time to visit remote surface water source intakes for the same water available near residential or easily accessible areas. Besides, it presents increased cost (e.g., per diem) to the technical staff during monitoring sessions, which private water source owners find higher than the analysis cost. Thus, samples shall only be taken at point of use, and for a new source, the closest downstream point shall be preferred as its quality would be a representative of the source intake to a large extent, unless a point source of pollution is identified to interfere.
- ○
- Water sampling and preservation prior to laboratory conveyance for microbial assessment shall be taken by private water source owners using guidelines presented by [67]. Glass bottles that require an autoclave for sterilization can be replaced by locally sold bottled water, as their cleanliness is assured by good manufacturing practices and regular factory and market monitoring by legal Tanzania quality regulatory bodies.
- ○
- Water quality testing laboratories should be simpler and less costly through the concept presented by [68], where electric conductivity (EC) shall be the basis of omitting unnecessary chemical parameters that could only increase analytical expenses, which is a burden and one of the critical reasons as to why the majority do not prefer water testing.
Publicly Owned Water Sources
3.2.2. Water Quality Trends
- Microbial quality: Most groundwater sources present limited microbial pollution in both seasons, but surface water sources guarantee microbial contamination in both seasons. Current water quality practices are emphasizing efforts to assess microbial quality in new and developed sources, and while these parameters require strict analytical precautions, it can be concluded that they are of no importance to their analysis in surface water sources (unless it intends to assess a microbial treatment practice efficiency), but rather significant in groundwater sources. Many water supply projects are constantly established based on funds and funder’s availability. Hence, when surface water sources are preferred, efforts on microbial assessment should be avoided, and treatment practices should be a mandatory part of the project infrastructure. State monitoring programmes that realize on-site water quality assessment can omit microbial analysis in untreated surface water sources/supplies as it increases complications, while the reality is always valid for this source category being vulnerable and containing contaminants.
- The trend shows the dominance of certain parameters in either surface or groundwater sources. Since regional water quality laboratories are focusing on their legal sphere of services and the fact that they aim to be accredited, it can be concluded that such laboratories better focus on accrediting respective nonqualifying parameters as a basic criterion. Furthermore, heavy metal assessments can be preferred over most qualifying parameters when there is a limited analytical scope coverage window.
3.2.3. Water Quality Remediation Practices
Heavy Metal Issues
Disinfection By-Products (DBPs) Issues
3.3. Quantity Aspect
3.3.1. Groundwater
3.3.2. Surface Water
4. Conclusions
- ○
- Groundwater abstraction should be controlled through metering and, hence, charging a reasonable tariff that will consider owners of invested well infrastructure, who shall be permitted to sell such water to neighbors to enhance service, while controlling abstraction charges by respective WSSAs.
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- Treatment of turbid surface water sources should be preferred as the process concurrently eliminates heavy metals in the final water; furthermore, other polluted sources can be subjected to blending practices using treated water to reach acceptable final contaminant limits prior to supply.
- ○
- Water quality assessment can be enhanced among private water source owners if water sampling is done by such an owner using a simplified procedure presented to them and a relevant state sampling protocol.
- ○
- Rural-based WSSAs/COWSOs must learn and implement best practices from urban WSSAs who, irrespective of higher operation and maintenance expenses, still provide water to urban communities at relatively low tariff cost compared to rural water suppliers.
- ○
- The diversity of water quality laboratories should be eliminated in order to improve management and minimize operations expenses while maximizing analytical capabilities. Only three to five fully furnished water laboratories are satisfactory in the country. This is possible if offices at regional and or district levels are established to facilitate in situ analysis of nonpreservable parameters and sample preservations for transportation to such designated laboratories.
Funding
Acknowledgments
Conflicts of Interest
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S/N | Parameter | Raw Water at Little Ruaha River | Borehole at Kibwabwa | Springwater at Kitwiru | Treated Water * |
---|---|---|---|---|---|
1 | Aluminium | 0.000 | 0.000 | 0.000 | 0.004 |
2 | Arsenic | 0.000 | 0.000 | 0.000 | 0.000 |
3 | Barium | 1.000 | 0.000 | 1.000 | 0.000 |
4 | Cadmium | 0.010 | 0.000 | 0.030 | 0.010 |
5 | Chromium | 0.000 | 0.000 | 0.000 | 0.000 |
6 | Cobalt | 0.410 | 0.000 | 0.320 | 0.000 |
7 | Copper | 0.000 | 0.010 | 0.000 | 0.010 |
8 | Iron | 0.100 | 0.010 | 0.030 | 0.020 |
9 | Lead | 0.002 | 0.000 | 0.004 | 0.000 |
10 | Manganese | 0.025 | 0.007 | 0.045 | 0.000 |
11 | Mercury | 0.001 | 0.000 | 0.000 | 0.000 |
12 | Molybdenum | 0.010 | 0.090 | 0.050 | 0.010 |
13 | Nickel | 0.000 | 0.034 | 0.147 | 0.000 |
14 | Selenium | 0.005 | 0.001 | 0.042 | 0.000 |
15 | Silver | 0.020 | 0.000 | 0.000 | 0.000 |
16 | Zinc | 0.050 | 0.000 | 0.030 | 0.000 |
S/N | DBP Species | Efficiency (%) | Reference |
---|---|---|---|
1 | Chloroform (TCM) | 69–97 | [81,82,83] |
2 | Bromodichloromethane (BDCM) | 68–98 | [81,82,83] |
3 | Dibromochloromethane (DBCM) | 51–100 | [81,82,83] |
4 | Bromoform (TBM) | 40–100 | [81,82,83] |
5 | Sum of 4 THMs (THM4) | 40–98 | [81,82,83] |
Financial Year | Successful Borehole | Average Yield per Borehole per Day (m3/d) | Total Yield per Day (×103 m3/d) |
---|---|---|---|
1998/1999 | 427 | 163.44 | 69.8 |
1999/2000 | 503 | 120.24 | 60.5 |
2000/2001 | 352 | 179.04 | 63 |
2001/2002 | 331 | 140.88 | 46.6 |
2002/2003 | 358 | 123.12 | 44.1 |
2003/2004 | 417 | 136.32 | 56.8 |
2004/2005 | 423 | 123.45 | 52.2 |
2005/2006 | 401 | 150 | 60.2 |
2006/2007 | 401 | 242.13 | 97.1 |
2007/2008 | 419 | 228 | 95.5 |
2008/2009 | 380 | 133.8 | 50.8 |
2009/2010 | 254 | 142.10 | 36.1 |
2010/2011 | 219 | 102.00 | 22.3 |
2011/2012 | 226 | 249.3 | 56.3 |
2012/2013 | 205 | 137.66 | 28.2 |
2013/2014 | 116 | 142.95 | 16.6 |
2014/2015 | 285 | 166.85 | 47.6 |
Total | 5717 | 2681.28 | 903.7 |
S/N | WSSA/COWSO | Source | Supply Mode | Treatment Practices | Population Served | Connection | Tariff (TShs/m3) | ||
---|---|---|---|---|---|---|---|---|---|
Public | Private | Public | Private | ||||||
1 | IIRUWASA-(M) | R, BH, and Sp | P | F, SF, C, and B | 138,000 | 128 | 24,553 | 1000 | 1685–2035 |
2 | Kilolo—(D) | St | G and P | C | 28,000 | 70 | 724 | 1000 | 485 |
3 | Mafinga—Smt | St and Sp | G and P | C | 72,000 | 1 | 3768 | 500 | 790-930 |
4 | Ilula—Smt | St | G | C | 40,700 | 56 | 1186 | 1500–2500 1000FR | 500–600 5000FR |
5 | Magubike—(R) | R | G | C | 15,000 | 62 | 187 | 1500 | 1500 |
6 | Ifunda—(R) | Sp | P | C | 6000 | 20 | 5 | 2500 | 2000 |
7 | Kidabaga—(R) | R | P | C | 2300 | 13 | 40 | 2500 | 2500 |
8 | Ng’uruhe—(R) | St | G | C | 2900 | 48 | 78 | 2000FR | 5000FR |
9 | Ihimbo—(R) | St | G | C | 2700 | 18 | 66 | 1000 | 5000 |
10 | Mgama—(R) | St | G | C | 1000 | 17 | 110 | 1000FR | 1667FR |
11 | Irindi—(R) | St | G | C | 2400 | 16 | 27 | 1000 | 5000 |
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Lufingo, M. Public Water Supply and Sanitation Authorities for Strategic Sustainable Domestic Water Management. A Case of Iringa Region In Tanzania. J 2019, 2, 449-466. https://doi.org/10.3390/j2040029
Lufingo M. Public Water Supply and Sanitation Authorities for Strategic Sustainable Domestic Water Management. A Case of Iringa Region In Tanzania. J. 2019; 2(4):449-466. https://doi.org/10.3390/j2040029
Chicago/Turabian StyleLufingo, Mesia. 2019. "Public Water Supply and Sanitation Authorities for Strategic Sustainable Domestic Water Management. A Case of Iringa Region In Tanzania" J 2, no. 4: 449-466. https://doi.org/10.3390/j2040029
APA StyleLufingo, M. (2019). Public Water Supply and Sanitation Authorities for Strategic Sustainable Domestic Water Management. A Case of Iringa Region In Tanzania. J, 2(4), 449-466. https://doi.org/10.3390/j2040029