Table 2.
Parameter limits are according to DIN 19643-1 [21]. Limits are only valid for pool water and filtrate (not for balance tank water and filter backwash water).
| Microbial Parameter | Method | Parameter Limits | Chemical Parameter | Method | Parameter Limits |
|---|---|---|---|---|---|
| Total heterotrophic counts at 36 °C | TrinkwV, appendix 5 | <100 CFU/mL | THM (mg/L) | DIN EN ISO 10301:1997 | <0.02 |
| Escherichia coli | DIN EN ISO 9308-2 | <1 CFU/100 mL | Bromate (mg/L) | DIN EN ISO 15061 | <2.0 |
| Pseudomonas aeruginosa | DIN EN ISO 16266 | <1 CFU/100 mL | Chlorate and chlorite (mg/L) | LC-MS | <30 |
| Al (mg/L) | DIN EN ISO 11885 | <0.05 | |||
| Fe (mg/L) | DIN EN ISO 11885 | <0.02 | |||
| pH | DIN EN ISO 10523 | 6.5–7.5 | |||
| KS4.3 (mmol/L) | DIN 38409-1 | >0.7 | |||
| Nitrate (mg/L) | EN ISO 10304:1995 | <20 | |||
| Ox. (mg/L) | DIN EN ISO 8467 | <0.75 | |||
| Redox (mV) | DIN 38404-6 | >750 | |||
| Free chlorine (mg/L) | DIN EN ISO 7393-1 | 0.3–0.6 | |||
| Bound chlorine (mg/L) | DIN EN ISO 7393-1 | <0.2 | |||
THM: Trihalogenmethane; LC-MS: Liquid chromatography–mass spectrometry.